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Posted to notifications@skywalking.apache.org by gi...@apache.org on 2023/01/12 02:45:50 UTC

[skywalking-website] branch asf-site updated: deploy: ffc8bc32f135943c5df687ad34eb4496da4a0066

This is an automated email from the ASF dual-hosted git repository.

github-bot pushed a commit to branch asf-site
in repository https://gitbox.apache.org/repos/asf/skywalking-website.git


The following commit(s) were added to refs/heads/asf-site by this push:
     new 04e81e0b3ba deploy: ffc8bc32f135943c5df687ad34eb4496da4a0066
04e81e0b3ba is described below

commit 04e81e0b3baaf1b12dbb7b220e16a9e97efcf7c4
Author: wu-sheng <wu...@users.noreply.github.com>
AuthorDate: Thu Jan 12 02:45:39 2023 +0000

    deploy: ffc8bc32f135943c5df687ad34eb4496da4a0066
---
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         </li>
         
         <li>
@@ -3952,6 +3957,12 @@ if (!doNotTrack) {
 
 
 
+
+
+
+
+
+
 
 
 
diff --git a/blog/2019-01-25-mesh-loadtest/index.html b/blog/2019-01-25-mesh-loadtest/index.html
index 28a7bdb7e12..b226d4645e8 100644
--- a/blog/2019-01-25-mesh-loadtest/index.html
+++ b/blog/2019-01-25-mesh-loadtest/index.html
@@ -25,11 +25,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2019-01-25-mesh-loadtest/" />
 <meta property="article:published_time" content="2019-01-25T00:00:00+00:00" />
-<meta property="article:modified_time" content="2023-01-09T18:05:38+08:00" />
+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="SkyWalking performance in Service Mesh scenario">
 <meta itemprop="description" content="Service mesh receiver performance test on Google Kubernetes Engine.">
 <meta itemprop="datePublished" content="2019-01-25T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2023-01-09T18:05:38+08:00" />
+<meta itemprop="dateModified" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="wordCount" content="758">
 
 
@@ -372,6 +372,11 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -422,7 +427,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -507,7 +512,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -3952,6 +3957,12 @@ if (!doNotTrack) {
 
 
 
+
+
+
+
+
+
 
 
 
diff --git a/blog/2019-09-25-alarm-webhook-share/index.html b/blog/2019-09-25-alarm-webhook-share/index.html
index 6083e929e24..9099eaf55e4 100644
--- a/blog/2019-09-25-alarm-webhook-share/index.html
+++ b/blog/2019-09-25-alarm-webhook-share/index.html
@@ -25,11 +25,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2019-09-25-alarm-webhook-share/" />
 <meta property="article:published_time" content="2019-09-25T00:00:00+00:00" />
-<meta property="article:modified_time" content="2023-01-09T18:05:38+08:00" />
+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="SkyWalking alarm webhook sharing">
 <meta itemprop="description" content=" Alerts via SkyWalking alarm webhook for better perception of tracing.">
 <meta itemprop="datePublished" content="2019-09-25T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2023-01-09T18:05:38+08:00" />
+<meta itemprop="dateModified" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="wordCount" content="98">
 
 
@@ -357,6 +357,11 @@ bash build/build.sh
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -407,7 +412,7 @@ bash build/build.sh
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -492,7 +497,7 @@ bash build/build.sh
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -3932,6 +3937,12 @@ bash build/build.sh
 
 
 
+
+
+
+
+
+
 
 
 
diff --git a/blog/2020-01-20-celebrate-200th-contributor/index.html b/blog/2020-01-20-celebrate-200th-contributor/index.html
index 8ebc1e7e7c9..dbcd168966d 100644
--- a/blog/2020-01-20-celebrate-200th-contributor/index.html
+++ b/blog/2020-01-20-celebrate-200th-contributor/index.html
@@ -25,11 +25,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2020-01-20-celebrate-200th-contributor/" />
 <meta property="article:published_time" content="2020-01-20T00:00:00+00:00" />
-<meta property="article:modified_time" content="2023-01-09T18:05:38+08:00" />
+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="SkyWalking hits 200 contributors mark">
 <meta itemprop="description" content=" SkyWalking community joins the 200&#43; contributors open source club.">
 <meta itemprop="datePublished" content="2020-01-20T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2023-01-09T18:05:38+08:00" />
+<meta itemprop="dateModified" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="wordCount" content="643">
 
 
@@ -338,6 +338,11 @@ At the moment of graduation in spring 2019, the project had 100 contributors. No
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -388,7 +393,7 @@ At the moment of graduation in spring 2019, the project had 100 contributors. No
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -473,7 +478,7 @@ At the moment of graduation in spring 2019, the project had 100 contributors. No
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -3900,6 +3905,12 @@ At the moment of graduation in spring 2019, the project had 100 contributors. No
 
 
 
+
+
+
+
+
+
 
 
 
diff --git a/blog/2020-04-13-apache-skywalking-profiling/index.html b/blog/2020-04-13-apache-skywalking-profiling/index.html
index 33be698cd63..737a7f4dd2c 100644
--- a/blog/2020-04-13-apache-skywalking-profiling/index.html
+++ b/blog/2020-04-13-apache-skywalking-profiling/index.html
@@ -25,11 +25,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2020-04-13-apache-skywalking-profiling/" />
 <meta property="article:published_time" content="2020-04-13T00:00:00+00:00" />
-<meta property="article:modified_time" content="2023-01-09T18:05:38+08:00" />
+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="Apache SkyWalking: Use Profiling to Fix the Blind Spot of Distributed Tracing">
 <meta itemprop="description" content="This post introduces a way to automatically profile code in production with Apache SkyWalking. We believe the profile method helps reduce maintenance and overhead while increasing the precision in root cause analysis.">
 <meta itemprop="datePublished" content="2020-04-13T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2023-01-09T18:05:38+08:00" />
+<meta itemprop="dateModified" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="wordCount" content="1368">
 
 
@@ -386,6 +386,11 @@ try {
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -436,7 +441,7 @@ try {
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -521,7 +526,7 @@ try {
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -3966,6 +3971,12 @@ try {
 
 
 
+
+
+
+
+
+
 
 
 
diff --git a/blog/2020-07-26-apdex-and-skywalking/index.html b/blog/2020-07-26-apdex-and-skywalking/index.html
index 92c81324717..bafde7deec1 100644
--- a/blog/2020-07-26-apdex-and-skywalking/index.html
+++ b/blog/2020-07-26-apdex-and-skywalking/index.html
@@ -25,11 +25,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2020-07-26-apdex-and-skywalking/" />
 <meta property="article:published_time" content="2020-07-26T00:00:00+00:00" />
-<meta property="article:modified_time" content="2023-01-09T18:05:38+08:00" />
+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="The Apdex Score for Measuring Service Mesh Health">
 <meta itemprop="description" content=" In managing Service Mesh Health, Asking `How are you&#39; is more profound than `What are your symptoms&#39;. Apdex goes a long way in helping this.">
 <meta itemprop="datePublished" content="2020-07-26T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2023-01-09T18:05:38+08:00" />
+<meta itemprop="dateModified" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="wordCount" content="1605">
 
 
@@ -389,6 +389,11 @@ Apdex Score  =  ------------------------------------------------------
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -439,7 +444,7 @@ Apdex Score  =  ------------------------------------------------------
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -524,7 +529,7 @@ Apdex Score  =  ------------------------------------------------------
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -3977,6 +3982,12 @@ Apdex Score  =  ------------------------------------------------------
 
 
 
+
+
+
+
+
+
 
 
 
diff --git a/blog/2020-08-03-skywalking8-1-release/index.html b/blog/2020-08-03-skywalking8-1-release/index.html
index 03a32092ae6..fafe15e1c0c 100644
--- a/blog/2020-08-03-skywalking8-1-release/index.html
+++ b/blog/2020-08-03-skywalking8-1-release/index.html
@@ -25,11 +25,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2020-08-03-skywalking8-1-release/" />
 <meta property="article:published_time" content="2020-08-03T00:00:00+00:00" />
-<meta property="article:modified_time" content="2023-01-09T18:05:38+08:00" />
+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="Features in SkyWalking 8.1: SpringSleuth metrics, endpoint dependency detection, Kafka transport traces and metrics">
 <meta itemprop="description" content=" SpringSleuth metrics, endpoint dependency detection, Kafka transport traces and metrics.">
 <meta itemprop="datePublished" content="2020-08-03T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2023-01-09T18:05:38+08:00" />
+<meta itemprop="dateModified" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="wordCount" content="625">
 
 
@@ -356,6 +356,11 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -406,7 +411,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -491,7 +496,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -3933,6 +3938,12 @@ if (!doNotTrack) {
 
 
 
+
+
+
+
+
+
 
 
 
diff --git a/blog/2020-08-11-observability-at-scale/index.html b/blog/2020-08-11-observability-at-scale/index.html
index 197dfecb671..75942f70fcb 100644
--- a/blog/2020-08-11-observability-at-scale/index.html
+++ b/blog/2020-08-11-observability-at-scale/index.html
@@ -25,11 +25,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2020-08-11-observability-at-scale/" />
 <meta property="article:published_time" content="2020-08-11T00:00:00+00:00" />
-<meta property="article:modified_time" content="2023-01-09T18:05:38+08:00" />
+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="Observability at Scale: SkyWalking it is">
 <meta itemprop="description" content=" SkyWalking evolved to address the problem of observability at scale, and grew from a pure tracing system to a feature-rich observability platform that is now used to analyze deployments that collect tens of billions of traces per day. ">
 <meta itemprop="datePublished" content="2020-08-11T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2023-01-09T18:05:38+08:00" />
+<meta itemprop="dateModified" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="wordCount" content="1144">
 
 
@@ -393,6 +393,11 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -443,7 +448,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -528,7 +533,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -3975,6 +3980,12 @@ if (!doNotTrack) {
 
 
 
+
+
+
+
+
+
 
 
 
diff --git a/blog/2020-10-29-skywalking8-2-release/index.html b/blog/2020-10-29-skywalking8-2-release/index.html
index 02154f1ac5f..0b2a44ef18c 100644
--- a/blog/2020-10-29-skywalking8-2-release/index.html
+++ b/blog/2020-10-29-skywalking8-2-release/index.html
@@ -25,11 +25,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2020-10-29-skywalking8-2-release/" />
 <meta property="article:published_time" content="2020-10-29T00:00:00+00:00" />
-<meta property="article:modified_time" content="2023-01-09T18:05:38+08:00" />
+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="Features in SkyWalking 8.2: Browser Side Monitoring; Query Traces by Tags; Meter Analysis Language">
 <meta itemprop="description" content="Browser Side Monitoring; Query Traces by Tags; Meter Analysis Language; Composite Alert Rules">
 <meta itemprop="datePublished" content="2020-10-29T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2023-01-09T18:05:38+08:00" />
+<meta itemprop="dateModified" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="wordCount" content="595">
 
 
@@ -356,6 +356,11 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -406,7 +411,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -491,7 +496,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -3934,6 +3939,12 @@ if (!doNotTrack) {
 
 
 
+
+
+
+
+
+
 
 
 
diff --git a/blog/2020-11-21-apachecon-keynote/index.html b/blog/2020-11-21-apachecon-keynote/index.html
index dea63a26b25..38d04db6e95 100644
--- a/blog/2020-11-21-apachecon-keynote/index.html
+++ b/blog/2020-11-21-apachecon-keynote/index.html
@@ -25,11 +25,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2020-11-21-apachecon-keynote/" />
 <meta property="article:published_time" content="2020-11-20T00:00:00+00:00" />
-<meta property="article:modified_time" content="2023-01-09T18:05:38+08:00" />
+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="[Video] Apache grows in China">
 <meta itemprop="description" content="ApacheCon@Home 2020 Keynote, the progress about China embracing the Apache culture, and willing of enhancing the whole Apache community.">
 <meta itemprop="datePublished" content="2020-11-20T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2023-01-09T18:05:38+08:00" />
+<meta itemprop="dateModified" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="wordCount" content="193">
 
 
@@ -329,6 +329,11 @@ Many developers have joined the ASF as new contributors, committers, foundation
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -379,7 +384,7 @@ Many developers have joined the ASF as new contributors, committers, foundation
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -464,7 +469,7 @@ Many developers have joined the ASF as new contributors, committers, foundation
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -3891,6 +3896,12 @@ Many developers have joined the ASF as new contributors, committers, foundation
 
 
 
+
+
+
+
+
+
 
 
 
diff --git a/blog/2020-11-21-apachecon-obs-apisix/index.html b/blog/2020-11-21-apachecon-obs-apisix/index.html
index 60a6e6ec456..bd606d057a6 100644
--- a/blog/2020-11-21-apachecon-obs-apisix/index.html
+++ b/blog/2020-11-21-apachecon-obs-apisix/index.html
@@ -25,11 +25,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/2020-11-21-apachecon-obs-apisix/" />
 <meta property="article:published_time" content="2020-11-21T00:00:00+00:00" />
-<meta property="article:modified_time" content="2023-01-09T18:05:38+08:00" />
+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="[Video] Improve Apache APISIX observability with Apache SkyWalking">
 <meta itemprop="description" content="ApacheCon@Home 2020 Observability Track">
 <meta itemprop="datePublished" content="2020-11-21T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2023-01-09T18:05:38+08:00" />
+<meta itemprop="dateModified" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="wordCount" content="88">
 
 
@@ -327,6 +327,11 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -377,7 +382,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -462,7 +467,7 @@ if (!doNotTrack) {
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -3889,6 +3894,12 @@ if (!doNotTrack) {
 
 
 
+
+
+
+
+
+
 
 
 
diff --git a/blog/2020-11-21-apachecon-obs-shardingsphere/index.html b/blog/2020-11-21-apachecon-obs-shardingsphere/index.html
index f1bbb7aa008..250d87583d7 100644
--- a/blog/2020-11-21-apachecon-obs-shardingsphere/index.html
+++ b/blog/2020-11-21-apachecon-obs-shardingsphere/index.html
@@ -25,11 +25,11 @@
 <meta property="og:type" content="article" />
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diff --git a/blog/2021-03-16-continuous-feedback/index.html b/blog/2021-03-16-continuous-feedback/index.html
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@@ -339,6 +339,11 @@ version 7.11. So please choose the suitable Elasticsearch version according to y
         
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             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
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diff --git a/blog/2021-07-12-500-contributors-mark/index.html b/blog/2021-07-12-500-contributors-mark/index.html
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             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
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@@ -391,6 +391,11 @@ In this blog, we will show you how to use it, and we will introduce the mechanis
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
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@@ -797,6 +797,11 @@ When profile_task_segment_snapshot includes a row with timestamp 1637494131000,
         
         <li>
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diff --git a/blog/2021-12-13-skywalking-nginx-agent-integration/index.html b/blog/2021-12-13-skywalking-nginx-agent-integration/index.html
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diff --git a/blog/2021-12-21-better-observability-for-chaos-engineering/index.html b/blog/2021-12-21-better-observability-for-chaos-engineering/index.html
index ec926b9b833..35977bca7a5 100644
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+
 
 
 
diff --git a/blog/2022-01-24-scaling-with-apache-skywalking/index.html b/blog/2022-01-24-scaling-with-apache-skywalking/index.html
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         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
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+
 
 
 
diff --git a/blog/2022-01-28-volcengine-violates-aplv2/index.html b/blog/2022-01-28-volcengine-violates-aplv2/index.html
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         <li>
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@@ -3952,6 +3957,12 @@ from tool assessment and manual assessment.
 
 
 
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diff --git a/blog/2022-04-14-integrating-skywalking-with-source-code/index.html b/blog/2022-04-14-integrating-skywalking-with-source-code/index.html
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@@ -690,6 +690,11 @@ Hello World!
         
         <li>
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+            <span class="count">4</span>
+        </li>
+        
+        <li>
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+            <span class="count">4</span>
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         <li>
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+
+
+
+
+
+
 
 
 
diff --git a/blog/2022-05-08-apache-shenyuincubating-integrated-skywalking-practice-observability/index.html b/blog/2022-05-08-apache-shenyuincubating-integrated-skywalking-practice-observability/index.html
index 3402ca71ada..f8d59f4d590 100644
--- a/blog/2022-05-08-apache-shenyuincubating-integrated-skywalking-practice-observability/index.html
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@@ -422,6 +422,11 @@ Also, thanks to SkyWalking such an excellent open source software to the industr
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
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+        <li>
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         <li>
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diff --git a/blog/2022-07-05-pinpoint-service-mesh-critical-performance-impact-by-using-ebpf/index.html b/blog/2022-07-05-pinpoint-service-mesh-critical-performance-impact-by-using-ebpf/index.html
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@@ -461,6 +461,11 @@ if (!doNotTrack) {
         
         <li>
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+        <li>
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diff --git a/blog/2022-08-11-kongcast-20-distributed-tracing-using-skywalking-kong/index.html b/blog/2022-08-11-kongcast-20-distributed-tracing-using-skywalking-kong/index.html
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@@ -348,6 +348,11 @@ technical account manager working across many of their enterprise strategic acco
         
         <li>
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diff --git a/blog/2022-12-13-how-to-run-apache-skywalking-on-aws-eks-rds/index.html b/blog/2022-12-13-how-to-run-apache-skywalking-on-aws-eks-rds/index.html
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@@ -467,6 +467,11 @@ traffic.</p>
         
         <li>
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+            <span class="count">4</span>
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diff --git a/blog/2023-01-03-aliyun-copy-page/index.html b/blog/2023-01-03-aliyun-copy-page/index.html
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+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="[License Issue] Aliyun(阿里云)&#39;s trace analysis service copied SkyWalking&#39;s trace profiling page.">
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@@ -249,7 +249,7 @@ and they never mentioned this page is actually copied from upstream.</p>
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   </li>
-    <a  class="btn btn-primary  disabled">Next <span class="ml-1">→</span></a>
+    <a href="/blog/ebpf-enhanced-http-observability-l7-metrics-and-tracing/" class="btn btn-primary ">Next <span class="ml-1">→</span></a>
   </li>
 </ul>
 
@@ -333,6 +333,11 @@ and they never mentioned this page is actually copied from upstream.</p>
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
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         <li>
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+            <span class="count">4</span>
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diff --git a/blog/e2e-design/index.html b/blog/e2e-design/index.html
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-<meta property="og:description" content="This article will show how to use Apache SkyWalking with eBPF to make network troubleshooting easier in a service mesh environment." />
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-    <title>Diagnose Service Mesh Network Performance with eBPF | Apache SkyWalking</title>
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@@ -210,289 +210,227 @@ if (!doNotTrack) {
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 <div class="td-content">
-	<h1>Diagnose Service Mesh Network Performance with eBPF</h1>
-	<div class="lead">This article will show how to use Apache SkyWalking with eBPF to make network troubleshooting easier in a service mesh environment.</div>
+	<h1>eBPF enhanced HTTP observability - L7 metrics and tracing</h1>
+	<div class="lead">This article will show how to use Apache SkyWalking with eBPF to enhance metrics and traces in HTTP observability.</div>
 	<div class="td-byline mb-4">
 		By <b>Han Liu, Sheng Wu</b> |
-		<time datetime="2022-09-27" class="text-muted">Tuesday, September 27, 2022</time>
+		<time datetime="2023-01-12" class="text-muted">Thursday, January 12, 2023</time>
 
 
 		
 		<p class="mt-1 tags-box">
 			<i class="iconfont icon-tags"></i>Tags |
 			
+			<span> <a href="/tags/trace">Trace</a></span>
+			
+			<span> <a href="/tags/metric">Metric</a></span>
+			
 			<span> <a href="/tags/ebpf">eBPF</a></span>
 			
-			<span> <a href="/tags/performance">Performance</a></span>
+			<span> <a href="/tags/http">HTTP</a></span>
 			
 		</p>
 		
 
 
 	</div>
-	<h2 id="background">Background</h2>
-<p>This article will show how to use <a href="https://github.com/apache/skywalking">Apache SkyWalking</a> with <a href="https://ebpf.io/what-is-ebpf/">eBPF</a> to make network troubleshooting easier in a service mesh environment.</p>
-<p>Apache SkyWalking is an application performance monitor tool for distributed systems. It observes metrics, logs, traces, and events in the service mesh environment and uses that data to generate a dependency graph of your pods and services. This dependency graph can provide quick insights into your system, especially when there&rsquo;s an issue.</p>
-<p>However, when troubleshooting network issues in SkyWalking&rsquo;s service topology, it is not always easy to pinpoint where the error actually is. There are two reasons for the difficulty:</p>
-<ul>
-<li><strong>Traffic through the Envoy sidecar is not easy to observe.</strong> Data from Envoy&rsquo;s <a href="https://www.envoyproxy.io/docs/envoy/latest/api-v3/service/accesslog/v3/als.proto">Access Log Service (ALS)</a> shows traffic between services (sidecar-to-sidecar), but not metrics on communication between the Envoy sidecar and the service it proxies. Without that information, it is more difficult to understand the impact of the sidecar.</li>
-<li><strong>There is a lack of data from transport layer (OSI Layer 4) communication.</strong> Since services generally use application layer (OSI Layer 7) protocols such as HTTP, observability data is generally restricted to application layer communication. However, the root cause may actually be in the transport layer, which is typically opaque to observability tools.</li>
-</ul>
-<p>Access to metrics from Envoy-to-service and transport layer communication can make it easier to diagnose service issues. To this end, SkyWalking needs to collect and analyze transport layer metrics between processes inside Kubernetes pods - a task well suited to eBPF. We investigated using eBPF for this purpose and present our results and
-a demo below.</p>
-<h2 id="monitoring-kubernetes-networks-with-ebpf">Monitoring Kubernetes Networks with eBPF</h2>
-<p>With its origins as the Extended Berkeley Packet Filter, eBPF is a general purpose mechanism for injecting and running your own code into the Linux kernel and is an excellent tool for monitoring network traffic in Kubernetes Pods. In the next few sections, we'll provide an overview of how to use eBPF for network monitoring as background for introducing <a href="https://github.com/apache/skywalking-rover">Skywalking Rover</a>, a metrics collector and profiler powered by eBPF to diagnos [...]
-<h3 id="how-applications-and-the-network-interact">How Applications and the Network Interact</h3>
-<p>Interactions between the application and the network can generally be
-divided into the following steps from higher to lower levels of
-abstraction:</p>
-<p><img src="f0.svg" alt=""></p>
-<ol>
-<li><strong>User Code:</strong> Application code uses high-level network libraries in the application stack to exchange data across the network, like sending and receiving HTTP requests.</li>
-<li><strong>Network Library:</strong> When the network library receives a network request, it interacts with the language API to send the network data.</li>
-<li><strong>Language API:</strong> Each language provides an API for operating the network, system, etc. When a request is received, it interacts with the system API. In Linux, this API is called syscalls.</li>
-<li><strong>Linux API:</strong> When the Linux kernel receives the request through the API, it communicates with the socket to send the data, which is usually closer to an OSI Layer 4 protocol, such as TCP, UDP, etc.</li>
-<li><strong>Socket Ops:</strong> Sending or receiving the data to/from the NIC.</li>
-</ol>
-<p>Our hypothesis is that eBPF can monitor the network. There are two ways
-to implement the interception: <strong>User space (uprobe)</strong> or <strong>Kernel space
-(kprobe)</strong>. The table below summarizes the differences.</p>
-<table>
-<thead>
-<tr>
-<th></th>
-<th>Pros</th>
-<th>Cons</th>
-</tr>
-</thead>
-<tbody>
-<tr>
-<td>uprobe</td>
-<td>•	Get more application-related contexts, such as whether the current request is HTTP or HTTPS.</br>•	Requests and responses can be intercepted by a single method</td>
-<td>•	Data structures can be unstable, so it is more difficult to get the desired data. </br> •	Implementation may differ between language/library versions. </br> •	Does not work in applications without <a href="https://en.wikipedia.org/wiki/Symbol_table">symbol tables</a>.</td>
-</tr>
-<tr>
-<td>kprobe</td>
-<td>•	Available for all languages. </br> •	The data structure and methods are stable and do not require much adaptation. </br> •	Easier correlation with underlying data, such as getting the destination address of TCP, OSI Layer 4 protocol metrics, etc.</td>
-<td>•	A single request and response may be split into multiple probes. </br> •	Contextual information is not easy to get for stateful requests. For example header compression in HTTP/2.</td>
-</tr>
-</tbody>
-</table>
-<p>For the general network performance monitor, we chose to use the kprobe (intercept the syscalls) for the following reasons:</p>
-<ol>
-<li>It&rsquo;s available for applications written in any programming language, and it&rsquo;s stable, so it saves a lot of development/adaptation costs.</li>
-<li>It can be correlated with metrics from the system level, which makes it easier to troubleshoot.</li>
-<li>As a single request and response are split into multiple probes, we can use technology to correlate them.</li>
-<li>For contextual information, It&rsquo;s usually used in OSI Layer 7 protocol network analysis. So, if we just monitor the network performance, then they can be ignored.</li>
-</ol>
-<h3 id="kprobes-and-network-monitoring">Kprobes and network monitoring</h3>
-<p>Following the <a href="http://linasm.sourceforge.net/docs/syscalls/network.php">network syscalls of Linux documentation</a>, we can implement network monitoring by intercepting two types of methods: <strong>socket operations</strong> and <strong>send/receive</strong> methods.</p>
-<h4 id="socket-operations">Socket Operations</h4>
-<p>When accepting or connecting with another socket, we can get the
-following information:</p>
-<ol>
-<li><strong>Connection information</strong>: Includes the remote address from the connection which helps us to understand which pod is connected.</li>
-<li><strong>Connection statics:</strong> Includes basic metrics from sockets, such as round-trip time (<a href="https://en.wikipedia.org/wiki/Round-trip_delay">RTT</a>), lost packet count in TCP, etc.</li>
-<li><strong>Socket and file descriptor (<a href="https://en.wikipedia.org/wiki/File_descriptor">FD</a>) mapping:</strong> Includes the relationship between the Linux file descriptor and socket object. It is useful when sending and receiving data through a Linux file descriptor.</li>
-</ol>
-<h4 id="sendreceive">Send/Receive</h4>
-<p>The interface related to sending or receiving data is the focus of
-performance analysis. It mainly contains the following parameters:</p>
-<ol>
-<li><strong>Socket file descriptor:</strong> The file descriptor of the current operation corresponding to the socket.</li>
-<li><strong>Buffer:</strong> The data sent or received, passed as a byte array.</li>
-</ol>
-<p>Based on the above parameters, we can analyze the following data:</p>
-<ol>
-<li><strong>Bytes:</strong> The size of the packet in bytes.</li>
-<li><strong>Protocol:</strong> The protocol analysis according to the buffer data, such as HTTP, MySQL, etc.</li>
-<li><strong>Execution Time:</strong> The time it takes to send/receive the data.</li>
-</ol>
-<p>At this point (Figure 1) we can analyze the following steps for the
-whole lifecycle of the connection:</p>
-<ol>
-<li><strong>Connect/Accept:</strong> When the connection is created.</li>
-<li><strong>Transform:</strong> Sending and receiving data on the connection.</li>
-<li><strong>Close:</strong> When the connection is closed.</li>
-</ol>
-<p><img src="f1.svg" alt="Figure 1"></p>
-<p><em><strong>Figure 1</strong></em></p>
-<h3 id="protocol-and-tls">Protocol and TLS</h3>
-<p>The previous section described how to analyze connections using send or receive buffer data. For example, following the <a href="https://www.rfc-editor.org/rfc/rfc2068.html#section-4.1">HTTP/1.1 message specification</a> to analyze the connection. However, this does not work for TLS requests/responses.</p>
-<p><img src="f2.svg" alt="Figure 2"></p>
-<p><em><strong>Figure 2</strong></em></p>
-<p>When TLS is in use, the Linux Kernel transmits data encrypted in user space. In the figure above, The application usually transmits SSL data through a third-party library (such as OpenSSL). For this case, the Linux API can only get the encrypted data, so it cannot recognize any higher layer protocol. To decrypt inside eBPF, we need to follow these steps:</p>
+	<p><img src="banner.jpg" alt="banner"></p>
+<h2 id="background">Background</h2>
+<p>Apache SkyWalking is an open-source Application Performance Management system that helps users collect and aggregate logs, traces, metrics, and events for display on a UI. In the <a href="/blog/diagnose-service-mesh-network-performance-with-ebpf/">previous article</a>, we introduced how to use Apache SkyWalking Rover to analyze the network performance issue in the service mesh environment. However, in business scenarios, users often rely on mature layer 7 protocols, such as HTTP, for  [...]
+<p>This article will show how to use <a href="https://github.com/apache/skywalking">Apache SkyWalking</a> with <a href="https://ebpf.io/what-is-ebpf/">eBPF</a> to enhance metrics and traces in HTTP observability.</p>
+<h2 id="http-protocol-analysis">HTTP Protocol Analysis</h2>
+<p>HTTP is one of the most common Layer 7 protocols and is usually used to provide services to external parties and for inter-system communication. In the following sections, we will show how to identify and analyze HTTP/1.x protocols.</p>
+<h3 id="protocol-identification">Protocol Identification</h3>
+<p>In HTTP/1.x, the client and server communicate through a single file descriptor (FD) on each side. Figure 1 shows the process of communication involving the following steps:</p>
 <ol>
-<li><strong>Read unencrypted data through uprobe:</strong> Compatible multiple languages, using uprobe to capture the data that is not encrypted before sending or after receiving. In this way, we can get the original data and associate it with the socket.</li>
-<li><strong>Associate with socket:</strong> We can associate unencrypted data with the socket.</li>
+<li>Connect/accept: The client establishes a connection with the HTTP server, or the server accepts a connection from the client.</li>
+<li>Read/write (multiple times): The client or server reads and writes HTTPS requests and responses. A single request-response pair occurs within the same connection on each side.</li>
+<li>Close: The client and server close the connection.</li>
 </ol>
-<h4 id="openssl-use-case">OpenSSL Use case</h4>
-<p>For example, the most common way to send/receive SSL data is to use OpenSSL as a shared library, specifically the <a href="https://www.openssl.org/docs/man1.1.1/man3/SSL_read.html">SSL_read</a> and <a href="https://www.openssl.org/docs/man1.1.1/man3/SSL_write.html">SSL_write</a> methods to submit the buffer data with the socket.</p>
-<p>Following the <a href="https://www.openssl.org/docs/man1.1.1/man7/ssl.html">documentation</a>, we can intercept these two methods, which are almost identical to the API in Linux. The source code of the SSL structure in OpenSSL shows that the <a href="https://github.com/openssl/openssl/blob/9eae491721209f302a9a475bffd271370e8bcb8f/crypto/bio/bio_local.h#L115-L125">Socket FD</a> exists in the <a href="https://github.com/openssl/openssl/blob/9eae491721209f302a9a475bffd271370e8bcb8f/ssl/s [...]
-<p>In summary, with knowledge of how OpenSSL works, we can read unencrypted data in an eBPF function.</p>
-<h2 id="introducing-skywalking-rover-an-ebpf-based-metrics-collector-and-profiler">Introducing SkyWalking Rover, an eBPF-based Metrics Collector and Profiler</h2>
-<p><a href="https://github.com/apache/skywalking-rover">SkyWalking Rover</a> introduces the eBPF network profiling feature into the SkyWalking ecosystem. It&rsquo;s currently supported in a Kubernetes environment, so must be deployed inside a Kubernetes cluster. Once the deployment is complete, SkyWalking Rover can monitor the network for all processes inside a given Pod. Based on the monitoring data, SkyWalking can generate the topology relationship diagram and metrics between processes.</p>
-<h3 id="topology-diagram">Topology Diagram</h3>
-<p>The topology diagram can help us understand the network access between processes inside the same Pod, and between the process and external environment (other Pod or service). Additionally, it can identify the data direction of traffic based on the line flow direction.</p>
-<p>In Figure 3 below, all nodes within the hexagon are the internal process of a Pod, and nodes outside the hexagon are externally associated services or Pods. Nodes are connected by lines, which indicate the direction of requests or responses between nodes (client or server). The protocol is indicated on the line, and it&rsquo;s either HTTP(S), TCP, or TCP(TLS). Also, we can see in this figure that the line between Envoy and Python applications is bidirectional because Envoy intercepts  [...]
-<p><img src="f3.jpg" alt="Figure 3"></p>
-<p><em><strong>Figure 3</strong></em></p>
+<p>To obtain HTTP content, it’s necessary to read it from the second step of this process. As defined in the <a href="http://rfc-editor.org/rfc/rfc2068.html">RFC</a>, the content is contained within the data of the Layer 4 protocol and can be obtained by parsing the data. The request and response pair can be correlated because they both occur within the same connection on each side.</p>
+<p><img src="f1.png" alt="Figure 1: HTTP communication timeline."></p>
+<p><em>Figure 1: HTTP communication timeline.</em></p>
+<h3 id="http-pipeline">HTTP Pipeline</h3>
+<p><a href="https://en.wikipedia.org/wiki/HTTP_pipelining">HTTP pipelining</a> is a feature of HTTP/1.1 that enables multiple HTTP requests to be sent over a single TCP connection without waiting for the corresponding responses. This feature is important because it ensures that the order of the responses on the server side matches the order of the requests.</p>
+<p>Figure 2 illustrates how this works. Consider the following scenario: an HTTP client sends multiple requests to a server, and the server responds by sending the HTTP responses in the same order as the requests. This means that the first request sent by the client will receive the first response from the server, the second request will receive the second response, and so on.</p>
+<p>When designing HTTP parsing, we should follow this principle by adding request data to a list and removing the first item when parsing a response. This ensures that the responses are processed in the correct order.</p>
+<p><img src="f2.png" alt="Figure 2: HTTP/1.1  pipeline."></p>
+<p><em>Figure 2: HTTP/1.1  pipeline.</em></p>
 <h3 id="metrics">Metrics</h3>
-<p>Once we recognize the network call relationship between processes through the topology, we can select a specific line and view the TCP metrics between the two processes.</p>
-<p>The diagram below (Figure 4) shows the metrics of network monitoring between two processes. There are four metrics in each line. Two on the left side are on the client side, and two on the right side are on the server side. If the remote process is not in the same Pod, only one side of the metrics is displayed.</p>
-<p><img src="f4.jpg" alt="Figure 4"></p>
-<p><em><strong>Figure 4</strong></em></p>
-<p>The following two metric types are available:</p>
-<ol>
-<li><strong>Counter:</strong> Records the total number of data in a certain period. Each counter contains the following data:
-a.  <strong>Count:</strong> Execution count.
-b.  <strong>Bytes:</strong> Packet size in bytes.
-c.  <strong>Execution time:</strong> Execution duration.</li>
-<li><strong>Histogram:</strong> Records the distribution of data in the buckets.</li>
-</ol>
-<p>Based on the above data types, the following metrics are exposed:</p>
+<p>Based on the identification of the HTTP content and process topology diagram mentioned in the previous article, we can combine these two to generate process-to-process metrics data.</p>
+<p>Figure 3 shows the metrics that currently support the analysis between the two processes. Based on the HTTP request and response data, we can analyze the following data:</p>
 <table>
 <thead>
 <tr>
-<th>Name</th>
-<th>Type</th>
-<th>Unit</th>
-<th>Description</th>
+<th><strong>Metrics Name</strong></th>
+<th><strong>Type</strong></th>
+<th><strong>Unit</strong></th>
+<th><strong>Description</strong></th>
 </tr>
 </thead>
 <tbody>
 <tr>
-<td>Write</td>
-<td>Counter and histogram</td>
-<td>Millisecond</td>
-<td>The socket write counter.</td>
-</tr>
-<tr>
-<td>Read</td>
-<td>Counter and histogram</td>
-<td>Millisecond</td>
-<td>The socket read counter.</td>
+<td>Request CPM(Call Per Minute)</td>
+<td>Counter</td>
+<td>count</td>
+<td>The HTTP request count</td>
 </tr>
 <tr>
-<td>Write RTT</td>
-<td>Counter and histogram</td>
-<td>Microsecond</td>
-<td>The socket write round trip time (RTT) counter.</td>
+<td>Response Status CPM(Call Per Minute)</td>
+<td>Counter</td>
+<td>count</td>
+<td>The count of per HTTP response status code</td>
 </tr>
 <tr>
-<td>Connect</td>
-<td>Counter and histogram</td>
-<td>Millisecond</td>
-<td>The socket connect/accept with another server/client counter.</td>
+<td>Request Package Size</td>
+<td>Counter/Histogram</td>
+<td>Byte</td>
+<td>The request package size</td>
 </tr>
 <tr>
-<td>Close</td>
-<td>Counter and histogram</td>
-<td>Millisecond</td>
-<td>The socket with other socket counter.</td>
+<td>Response Package Size</td>
+<td>Counter/Histogram</td>
+<td>Byte</td>
+<td>The response package size</td>
 </tr>
 <tr>
-<td>Retransmit</td>
-<td>Counter</td>
+<td>Client Duration</td>
+<td>Counter/Histogram</td>
 <td>Millisecond</td>
-<td>The socket retransmit package counter.</td>
+<td>The duration of single HTTP response on the client side</td>
 </tr>
 <tr>
-<td>Drop</td>
-<td>Counter</td>
+<td>Server Duration</td>
+<td>Counter/Histogram</td>
 <td>Millisecond</td>
-<td>The socket drop package counter.</td>
+<td>The duration of single HTTP response on the server side</td>
 </tr>
 </tbody>
 </table>
+<p><img src="f3.png" alt="Figure 3: Process-to-process metrics."></p>
+<p><em>Figure 3: Process-to-process metrics.</em></p>
+<h2 id="http-and-trace">HTTP and Trace</h2>
+<p>During the HTTP process, if we unpack the HTTP requests and responses from raw data, we can use this data to correlate with the existing tracing system.</p>
+<h3 id="trace-context-identification">Trace Context Identification</h3>
+<p>In order to track the flow of requests between multiple services, the trace system usually creates a trace context when a request enters a service and passes it along to other services during the request-response process. For example, when an HTTP request is sent to another server, the trace context is included in the request header.</p>
+<p>Figure 4 displays the raw content of an HTTP request intercepted by Wireshark. The trace context information generated by the Zipkin Tracing system can be identified by the “X-B3” prefix in the header. By using eBPF to intercept the trace context in the HTTP header, we can connect the current request with the trace system.</p>
+<p><img src="f4.png" alt="Figure 4: View of HTTP headers in Wireshark."></p>
+<p><em>Figure 4: View of HTTP headers in Wireshark.</em></p>
+<h3 id="trace-event">Trace Event</h3>
+<p>We have added the concept of an <em>event</em> to traces. An event can be attached to a span and consists of start and end times, tags, and summaries, allowing us to attach any desired information to the Trace.</p>
+<p>When performing eBPF network profiling, two events can be generated based on the request-response data. Figure 5 illustrates what happens when a service performs an HTTP request with profiling. The trace system generates <em>trace context</em> information and sends it in the request. When the service executes in the kernel, we can generate an event for the corresponding trace span by interacting with the request-response data and execution time in the kernel space.</p>
+<p>Previously, we could only observe the execution status in the user space. However, by combining traces and eBPF technologies, we can now also get more information about the current trace in the kernel space, which would impact less performance for the target service if we do similar things in the tracing SDK and agent.</p>
+<p><img src="f5.png" alt="Figure 5: Logical view of profiling an HTTP request and response."></p>
+<p><em>Figure 5: Logical view of profiling an HTTP request and response.</em></p>
+<h3 id="sampling">Sampling</h3>
+<p>To ensure efficient data storage and minimize unnecessary data sampling, we use a sampling mechanism for traces in our system. This mechanism triggers sampling only when certain conditions are met. We also provide a list of the top <em>N</em> traces, which allows users to quickly access the relevant request information for a specific trace.</p>
+<p>To help users easily identify and analyze relevant events, we offer three different sampling rules:</p>
+<ol>
+<li><strong>Slow Traces</strong>: Sampling is triggered when the response time for a request exceeds a specified threshold.</li>
+<li><strong>Response Status [400, 500)</strong>: Sampling is triggered when the response status code is greater than or equal to 400 and less than 500.</li>
+<li><strong>Response Status [500, 600)</strong>: Sampling is triggered when the response status code is greater than or equal to 500 and less than 600.</li>
+</ol>
+<p>In addition, we recognize that not all request or response raw data may be necessary for analysis. For example, users may be more interested in requesting data when trying to identify performance issues, while they may be more interested in response data when troubleshooting errors. As such, we also provide configuration options for request or response events to allow users to specify which type of data they would like to sample.</p>
+<h2 id="profiling-in-a-service-mesh">Profiling in a Service Mesh</h2>
+<p>The SkyWalking and SkyWalking Rover projects have already implemented the HTTP protocol <em>analyze</em> and <em>trace</em> associations. How do they perform when running in a service mesh environment?</p>
+<h3 id="deployment">Deployment</h3>
+<p>Figure 6 demonstrates the deployment of SkyWalking and SkyWalking Rover in a service mesh environment. SkyWalking Rover is deployed as a DaemonSet on each machine where a service is located and communicates with the SkyWalking backend cluster. It automatically recognizes the services on the machine and reports metadata information to the SkyWalking backend cluster. When a new network profiling task arises, SkyWalking Rover senses the task and analyzes the designated processes, collect [...]
+<p><img src="f6.png" alt="Figure 6: SkyWalking rover deployment topology in a service mesh."></p>
+<p><em>Figure 6: SkyWalking rover deployment topology in a service mesh.</em></p>
+<h3 id="tracing-systems">Tracing Systems</h3>
+<p>Starting from version 9.3.0, the SkyWalking backend fully supports all functions in the Zipkin server. Therefore, the SkyWalking backend can collect traces from both the SkyWalking and Zipkin protocols. Similarly, SkyWalking Rover can identify and analyze trace context in both the SkyWalking and Zipkin trace systems. In the following two sections, network analysis results will be displayed in the SkyWalking and Zipkin UI respectively.</p>
+<h4 id="skywalking">SkyWalking</h4>
+<p>When SkyWalking performs network profiling, similar to the TCP metrics in the <a href="/blog/diagnose-service-mesh-network-performance-with-ebpf/">previous article</a>, the SkyWalking UI will first display the topology between processes. When you open the dashboard of the line representing the traffic metrics between processes, you can see the metrics of HTTP traffic from the “HTTP/1.x” tab and the sampled HTTP requests with tracing in the “HTTP Requests” tab.</p>
+<p>As shown in Figure 7, there are three lists in the tab, each corresponding to a condition in the event sampling rules. Each list displays the traces that meet the pre-specified conditions. When you click on an item in the trace list, you can view the complete trace.</p>
+<p><img src="f7.png" alt="Figure 7: Sampled HTTP requests within tracing context."></p>
+<p><em>Figure 7: Sampled HTTP requests within tracing context.</em></p>
+<p>When you click on an item in the trace list, you can quickly view the specified trace. In Figure 8, we can see that in the current service-related span, there is a tag with a number indicating how many HTTP events are related to that trace span.</p>
+<p>Since we are in a service mesh environment, each service involves interacting with Envoy. Therefore, the current span includes Envoy’s request and response information. Additionally, since the current service has both incoming and outgoing requests, there are events in the corresponding span.</p>
+<p><img src="f8.png" alt="Figure 8: Events in the trace detail."></p>
+<p><em>Figure 8: Events in the trace detail.</em></p>
+<p>When the span is clicked, the details of the span will be displayed. If there are events in the current span, the relevant event information will be displayed on a time axis. As shown in Figure 9, there are a total of 6 related events in the current Span. Each event represents a data sample of an HTTP request/response. One of the events spans multiple time ranges, indicating a longer system call time. It may be due to a blocked system call, depending on the implementation details of t [...]
+<p><img src="f9.png" alt="Figure 9: Events in one trace span."></p>
+<p><em>Figure 9: Events in one trace span.</em></p>
+<p>Finally, we can click on a specific event to see its complete information. As shown in Figure 10, it displays the sampling information of a request, including the SkyWalking trace context protocol contained in the request header from the HTTP raw data. The raw request data allows you to quickly re-request the request to solve any issues.</p>
+<p><img src="f10.png" alt="Figure 10: The detail of the event."></p>
+<p><em>Figure 10: The detail of the event.</em></p>
+<h4 id="zipkin">Zipkin</h4>
+<p>Zipkin is one of the most widely used distributed tracing systems in the world. SkyWalking can function as an <a href="https://zipkin.io/pages/extensions_choices.html">alternative server</a> to provide advanced features for Zipkin users. Here, we use this way to bring the feature into the Zipkin ecosystem out-of-box. The new events would also be treated as a kind of Zipkin’s tags and annotations.</p>
+<p>To add events to a Zipkin span, we need to do the following:</p>
+<ol>
+<li>Split the start and end times of each event into two annotations with a canonical name.</li>
+<li>Add the sampled HTTP raw data from the event to the Zipkin span tags, using the same event name for corresponding purposes.</li>
+</ol>
+<p>Figures 11 and 12 show annotations and tags in the same span. In these figures, we can see that the span includes at least two events with the same event name and sequence suffix (e.g., “Start/Finished HTTP Request/Response Sampling-x” in the figure). Both events have separate timestamps to represent their relative times within the span. In the tags, the data content of the corresponding event is represented by the event name and sequence number, respectively.</p>
+<p><img src="f11.png" alt="Figure 11: Event timestamp in the Zipkin span annotation."></p>
+<p><em>Figure 11: Event timestamp in the Zipkin span annotation.</em></p>
+<p><img src="f12.png" alt="Figure 12: Event raw data in the Zipkin span tag."></p>
+<p><em>Figure 12: Event raw data in the Zipkin span tag.</em></p>
 <h2 id="demo">Demo</h2>
-<p>In this section, we demonstrate how to perform network profiling in the
-service mesh. To follow along, you will need a running Kubernetes
-environment.</p>
-<p><strong>NOTE:</strong> All commands and scripts are available <a href="https://github.com/mrproliu/skywalking-network-profiling-demo">in this GitHub repository</a>.</p>
-<h3 id="install-istio">Install Istio</h3>
-<p>Istio is the most widely deployed service mesh, and comes with a complete demo application that we can use for testing. To install Istio and the demo application, follow these steps:</p>
+<p>In this section, we demonstrate how to perform network profiling in a service mesh and complete metrics collection and HTTP raw data sampling. To follow along, you will need a running Kubernetes environment.</p>
+<h3 id="deploy-skywalking-showcase">Deploy SkyWalking Showcase</h3>
+<p>SkyWalking Showcase contains a complete set of example services and can be monitored using SkyWalking. For more information, please check the <a href="https://skywalking.apache.org/docs/skywalking-showcase/next/readme/">official documentation</a>.</p>
+<p>In this demo, we only deploy service, the latest released SkyWalking OAP, and UI.</p>
+<div class="highlight"><pre style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-bash" data-lang="bash"><span style="color:#0086b3">export</span> <span style="color:#008080">SW_OAP_IMAGE</span><span style="color:#000;font-weight:bold">=</span>apache/skywalking-oap-server:9.3.0
+<span style="color:#0086b3">export</span> <span style="color:#008080">SW_UI_IMAGE</span><span style="color:#000;font-weight:bold">=</span>apache/skywalking-ui:9.3.0
+<span style="color:#0086b3">export</span> <span style="color:#008080">SW_ROVER_IMAGE</span><span style="color:#000;font-weight:bold">=</span>apache/skywalking-rover:0.4.0
+
+<span style="color:#0086b3">export</span> <span style="color:#008080">FEATURE_FLAGS</span><span style="color:#000;font-weight:bold">=</span>mesh-with-agent,single-node,elasticsearch,rover
+make deploy.kubernetes
+</code></pre></div><p>After deployment is complete, please run the following script to open SkyWalking UI: http://localhost:8080/.</p>
+<div class="highlight"><pre style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-bash" data-lang="bash">kubectl port-forward svc/ui 8080:8080 --namespace default
+</code></pre></div><h3 id="start-network-profiling-task">Start Network Profiling Task</h3>
+<p>Currently, we can select the specific instances that we wish to monitor by clicking the <strong>Data Plane</strong> item in the <strong>Service Mesh</strong> panel and the <strong>Service</strong> item in the <strong>Kubernetes</strong> panel.</p>
+<p>In figure 13, we have selected an instance with a list of tasks in the network profiling tab.</p>
+<p><img src="f13.png" alt="Figure 13: Network Profiling tab in the Data Plane."></p>
+<p><em>Figure 13: Network Profiling tab in the Data Plane.</em></p>
+<p>When we click the Start button, as shown in Figure 14, we need to specify the sampling rules for the profiling task. The sampling rules consist of one or more rules, each of which is distinguished by a different URI regular expression. When the HTTP request URI matches the regular expression, the rule is used. If the URI regular expression is empty, the default rule is used. Using multiple rules can help us make different sampling configurations for different requests.</p>
+<p>Each rule has three parameters to determine if sampling is needed:</p>
 <ol>
-<li>Install Istio using the demo configuration profile.</li>
-<li>Label the default namespace, so Istio automatically injects Envoy sidecar proxies when we&rsquo;ll deploy the application.</li>
-<li>Deploy the bookinfo application to the cluster.</li>
-<li>Deploy the traffic generator to generate some traffic to the application.</li>
+<li><strong>Minimal Request Duration (ms)</strong>: requests with a response time exceeding the specified time will be sampled.</li>
+<li><strong>Sampling response status code between 400 and 499</strong>: all status codes in the range [400-499) will be sampled.</li>
+<li><strong>Sampling response status code between 500 and 599</strong>: all status codes in the range [500-599) will be sampled.</li>
 </ol>
-<div class="highlight"><pre style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-bash" data-lang="bash"><span style="color:#0086b3">export</span> <span style="color:#008080">ISTIO_VERSION</span><span style="color:#000;font-weight:bold">=</span>1.13.1
-
-<span style="color:#998;font-style:italic"># install istio</span>
-istioctl install -y --set <span style="color:#008080">profile</span><span style="color:#000;font-weight:bold">=</span>demo
-kubectl label namespace default istio-injection<span style="color:#000;font-weight:bold">=</span>enabled
-
-<span style="color:#998;font-style:italic"># deploy the bookinfo applications</span>
-kubectl apply -f https://raw.githubusercontent.com/istio/istio/<span style="color:#008080">$ISTIO_VERSION</span>/samples/bookinfo/platform/kube/bookinfo.yaml
-kubectl apply -f https://raw.githubusercontent.com/istio/istio/<span style="color:#008080">$ISTIO_VERSION</span>/samples/bookinfo/networking/bookinfo-gateway.yaml
-kubectl apply -f https://raw.githubusercontent.com/istio/istio/<span style="color:#008080">$ISTIO_VERSION</span>/samples/bookinfo/networking/destination-rule-all.yaml
-kubectl apply -f https://raw.githubusercontent.com/istio/istio/<span style="color:#008080">$ISTIO_VERSION</span>/samples/bookinfo/networking/virtual-service-all-v1.yaml
-
-<span style="color:#998;font-style:italic"># generate traffic</span>
-kubectl apply -f https://raw.githubusercontent.com/mrproliu/skywalking-network-profiling-demo/main/resources/traffic-generator.yaml
-</code></pre></div><h3 id="install-skywalking">Install SkyWalking</h3>
-<p>The following will install the storage, backend, and UI needed for SkyWalking:</p>
-<div class="highlight"><pre style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-bash" data-lang="bash">git clone https://github.com/apache/skywalking-kubernetes.git
-<span style="color:#0086b3">cd</span> skywalking-kubernetes
-<span style="color:#0086b3">cd</span> chart
-helm dep up skywalking
-helm -n istio-system install skywalking skywalking <span style="color:#d14">\
-</span><span style="color:#d14"></span> --set <span style="color:#008080">fullnameOverride</span><span style="color:#000;font-weight:bold">=</span>skywalking <span style="color:#d14">\
-</span><span style="color:#d14"></span> --set elasticsearch.minimumMasterNodes<span style="color:#000;font-weight:bold">=</span><span style="color:#099">1</span> <span style="color:#d14">\
-</span><span style="color:#d14"></span> --set elasticsearch.imageTag<span style="color:#000;font-weight:bold">=</span>7.5.1 <span style="color:#d14">\
-</span><span style="color:#d14"></span> --set oap.replicas<span style="color:#000;font-weight:bold">=</span><span style="color:#099">1</span> <span style="color:#d14">\
-</span><span style="color:#d14"></span> --set ui.image.repository<span style="color:#000;font-weight:bold">=</span>apache/skywalking-ui <span style="color:#d14">\
-</span><span style="color:#d14"></span> --set ui.image.tag<span style="color:#000;font-weight:bold">=</span>9.2.0 <span style="color:#d14">\
-</span><span style="color:#d14"></span> --set oap.image.tag<span style="color:#000;font-weight:bold">=</span>9.2.0 <span style="color:#d14">\
-</span><span style="color:#d14"></span> --set oap.envoy.als.enabled<span style="color:#000;font-weight:bold">=</span><span style="color:#0086b3">true</span> <span style="color:#d14">\
-</span><span style="color:#d14"></span> --set oap.image.repository<span style="color:#000;font-weight:bold">=</span>apache/skywalking-oap-server <span style="color:#d14">\
-</span><span style="color:#d14"></span> --set oap.storageType<span style="color:#000;font-weight:bold">=</span>elasticsearch <span style="color:#d14">\
-</span><span style="color:#d14"></span> --set oap.env.SW_METER_ANALYZER_ACTIVE_FILES<span style="color:#000;font-weight:bold">=</span><span style="color:#d14">&#39;network-profiling&#39;</span>
-</code></pre></div><h3 id="install-skywalking-rover">Install SkyWalking Rover</h3>
-<p>SkyWalking Rover is deployed on every node in Kubernetes, and it automatically detects the services in the Kubernetes cluster. The network profiling feature has been released in the version 0.3.0 of SkyWalking Rover. When a network monitoring task is created, the SkyWalking rover sends the data to the SkyWalking backend.</p>
-<div class="highlight"><pre style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-bash" data-lang="bash">kubectl apply -f https://raw.githubusercontent.com/mrproliu/skywalking-network-profiling-demo/main/resources/skywalking-rover.yaml
-</code></pre></div><h3 id="start-the-network-profiling-task">Start the Network Profiling Task</h3>
-<p>Once all deployments are completed, we must create a network profiling task for a specific instance of the service in the SkyWalking UI.</p>
-<p>To open SkyWalking UI, run:</p>
-<div class="highlight"><pre style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-bash" data-lang="bash">kubectl port-forward svc/skywalking-ui 8080:80 --namespace
-istio-system
-</code></pre></div><p>Currently, we can select the specific instances that we wish to monitor by clicking the <strong>Data Plane</strong> item in the Service Mesh panel and the <strong>Service</strong> item in the <strong>Kubernetes</strong> panel.</p>
-<p>In the figure below, we have selected an instance with a list of tasks in the network profiling tab. When we click the start button, the SkyWalking Rover starts monitoring this instance&rsquo;s network.</p>
-<p><img src="f5.jpg" alt="Figure 5"></p>
-<p><em><strong>Figure 5</strong></em></p>
+<p>Once the sampling configuration is complete, we can create the task.</p>
+<p><img src="f14.png" alt="Figure 14: Create network profiling task page."></p>
+<p><em>Figure 14: Create network profiling task page.</em></p>
 <h3 id="done">Done!</h3>
 <p>After a few seconds, you will see the process topology appear on the right side of the page.</p>
-<p><img src="f6.jpg" alt="Figure 6"></p>
-<p><em><strong>Figure 6</strong></em></p>
-<p>When you click on the line between processes, you can see the TCP metrics between the two processes.</p>
-<p><img src="f7.jpg" alt="Figure 7"></p>
-<p><em><strong>Figure 7</strong></em></p>
+<p><img src="f15.png" alt="Figure 15"></p>
+<p>When you click on the line between processes, you can view the data between the two processes, which is divided into three tabs:</p>
+<ol>
+<li><strong>TCP</strong>: displays TCP-related metrics.</li>
+<li><strong>HTTP/1.x</strong>: displays metrics in the HTTP 1 protocol.</li>
+<li><strong>HTTP Requests</strong>: displays the analyzed request and saves it to a list according to the sampling rule.</li>
+</ol>
+<p><img src="f16.png" alt="Figure 16: TCP metrics in a network profiling task."></p>
+<p><em>Figure 16: TCP metrics in a network profiling task.</em></p>
+<p><img src="f17.png" alt="Figure 17: HTTP/1.x metrics in a network profiling task."></p>
+<p><em>Figure 17: HTTP/1.x metrics in a network profiling task.</em></p>
+<p><img src="f18.png" alt="Figure 18: HTTP sampled requests in a network profiling task."></p>
+<p><em>Figure 18: HTTP sampled requests in a network profiling task.</em></p>
 <h2 id="conclusion">Conclusion</h2>
-<p>In this article, we detailed a problem that makes troubleshooting service mesh architectures difficult: lack of context between layers in the network stack. These are the cases when eBPF begins to really help with debugging/productivity when existing service mesh/envoy cannot. Then, we researched how eBPF could be applied to common communication, such as TLS. Finally, we demo the implementation of this process with SkyWalking Rover.</p>
-<p>For now, we have completed the performance analysis for OSI layer 4 (mostly TCP). In the future, we will also introduce the analysis for OSI layer 7 protocols like HTTP.</p>
-<h2 id="get-started-with-istio">Get Started with Istio</h2>
-<p>To <a href="https://istio.tetratelabs.io/">get started with service mesh today, Tetrate Istio Distro</a> is the easiest way to install, manage, and upgrade Istio. It provides a vetted upstream distribution of Istio that&rsquo;s tested and optimized for specific platforms by Tetrate plus a CLI that facilitates acquiring, installing, and configuring multiple Istio versions. Tetrate Istio Distro also offers <a href="https://www.tetrate.io/blog/tetrate-istio-distro-achieves-fips-certifica [...]
-<p>For enterprises that need a unified and consistent way to secure and manage services and traditional workloads across complex, heterogeneous deployment environments, we offer <a href="https://www.tetrate.io/tetrate-service-bridge/">Tetrate Service Bridge</a>, our flagship edge-to-workload application connectivity platform built on Istio and Envoy.</p>
-<p><a href="https://www.tetrate.io/contact/">Contact us to learn more</a>.</p>
+<p>In this article, we detailed the overview of how to analyze the Layer 7 HTTP/1.x protocol in network analysis, and how to associate it with existing trace systems. This allows us to extend the scope of data we can observe from just user space to also include kernel-space data.</p>
+<p>In the future, we will delve further into the analysis of kernel data, such as collecting information on TCP packet size, transmission frequency, network card, and help on enhancing distributed tracing from another perspective.</p>
 <h2 id="additional-resources">Additional Resources</h2>
 <ol>
-<li><a href="https://github.com/apache/skywalking">SkyWalking Github Repo</a></li>
-<li><a href="https://github.com/apache/skywalking-rover">SkyWalking Rover Github Repo</a></li>
-<li><a href="https://skywalking.apache.org/docs/skywalking-rover/v0.3.0/readme/">SkyWalking Rover Documentation</a></li>
-<li><a href="https://skywalking.apache.org/blog/2022-07-05-pinpoint-service-mesh-critical-performance-impact-by-using-ebpf/">Pinpoint Service Mesh Critical Performance impact by using eBPF blog post</a></li>
-<li><a href="https://www.youtube.com/watch?v=yUF5qRk4rYY">Apache SkyWalking with Native eBPF Agent presentation</a></li>
-<li><a href="https://ebpf.io/what-is-ebpf#hook-overview">eBPF hook overview</a></li>
+<li><a href="https://github.com/apache/skywalking">SkyWalking Github Repo ›</a></li>
+<li><a href="https://github.com/apache/skywalking-rover">SkyWalking Rover Github Repo ›</a></li>
+<li><a href="https://skywalking.apache.org/docs/skywalking-rover/v0.3.0/readme/">SkyWalking Rover Documentation ›</a></li>
+<li><a href="https://skywalking.apache.org/blog/diagnose-service-mesh-network-performance-with-ebpf/">Diagnose Service Mesh Network Performance with eBPF blog post &gt;</a></li>
+<li><a href="https://skywalking.apache.org/docs/main/next/en/concepts-and-designs/profiling/">SkyWalking Profiling Documentation &gt;</a></li>
+<li><a href="https://skywalking.apache.org/docs/main/next/en/api/x-process-propagation-headers-v3/">SkyWalking Trace Context Propagation &gt;</a></li>
+<li><a href="https://github.com/openzipkin/b3-propagation">Zipkin Trace Context Propagation &gt;</a></li>
+<li><a href="https://www.rfc-editor.org/rfc/rfc2068.html">RFC - Hypertext Transfer Protocol – HTTP/1.1 &gt;</a></li>
 </ol>
 
 	
 
 	<ul class="list-unstyled d-flex justify-content-between align-items-center mb-0 pt-5">
   <li>
-    <a href="/blog/2022-08-11-kongcast-20-distributed-tracing-using-skywalking-kong/" class="btn btn-primary "><span class="mr-1">←</span> Previous</a>
+    <a href="/blog/2023-01-03-aliyun-copy-page/" class="btn btn-primary "><span class="mr-1">←</span> Previous</a>
   </li>
-    <a href="/blog/skywalkings-new-storage-feature-based-on-shardingsphere-proxy-mysql-sharding/" class="btn btn-primary ">Next <span class="ml-1">→</span></a>
+    <a  class="btn btn-primary  disabled">Next <span class="ml-1">→</span></a>
   </li>
 </ul>
 
@@ -576,6 +514,11 @@ istio-system
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -626,7 +569,7 @@ istio-system
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -711,7 +654,7 @@ istio-system
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -773,30 +716,34 @@ istio-system
     <li>
       <ul>
         <li><a href="#background">Background</a></li>
-        <li><a href="#monitoring-kubernetes-networks-with-ebpf">Monitoring Kubernetes Networks with eBPF</a>
+        <li><a href="#http-protocol-analysis">HTTP Protocol Analysis</a>
           <ul>
-            <li><a href="#how-applications-and-the-network-interact">How Applications and the Network Interact</a></li>
-            <li><a href="#kprobes-and-network-monitoring">Kprobes and network monitoring</a></li>
-            <li><a href="#protocol-and-tls">Protocol and TLS</a></li>
+            <li><a href="#protocol-identification">Protocol Identification</a></li>
+            <li><a href="#http-pipeline">HTTP Pipeline</a></li>
+            <li><a href="#metrics">Metrics</a></li>
           </ul>
         </li>
-        <li><a href="#introducing-skywalking-rover-an-ebpf-based-metrics-collector-and-profiler">Introducing SkyWalking Rover, an eBPF-based Metrics Collector and Profiler</a>
+        <li><a href="#http-and-trace">HTTP and Trace</a>
           <ul>
-            <li><a href="#topology-diagram">Topology Diagram</a></li>
-            <li><a href="#metrics">Metrics</a></li>
+            <li><a href="#trace-context-identification">Trace Context Identification</a></li>
+            <li><a href="#trace-event">Trace Event</a></li>
+            <li><a href="#sampling">Sampling</a></li>
+          </ul>
+        </li>
+        <li><a href="#profiling-in-a-service-mesh">Profiling in a Service Mesh</a>
+          <ul>
+            <li><a href="#deployment">Deployment</a></li>
+            <li><a href="#tracing-systems">Tracing Systems</a></li>
           </ul>
         </li>
         <li><a href="#demo">Demo</a>
           <ul>
-            <li><a href="#install-istio">Install Istio</a></li>
-            <li><a href="#install-skywalking">Install SkyWalking</a></li>
-            <li><a href="#install-skywalking-rover">Install SkyWalking Rover</a></li>
-            <li><a href="#start-the-network-profiling-task">Start the Network Profiling Task</a></li>
+            <li><a href="#deploy-skywalking-showcase">Deploy SkyWalking Showcase</a></li>
+            <li><a href="#start-network-profiling-task">Start Network Profiling Task</a></li>
             <li><a href="#done">Done!</a></li>
           </ul>
         </li>
         <li><a href="#conclusion">Conclusion</a></li>
-        <li><a href="#get-started-with-istio">Get Started with Istio</a></li>
         <li><a href="#additional-resources">Additional Resources</a></li>
       </ul>
     </li>
@@ -4173,6 +4120,12 @@ istio-system
 
 
 
+
+
+
+
+
+
 
 
 
diff --git a/blog/end-user-tracing-in-a-skywalking-observed-browser/index.html b/blog/end-user-tracing-in-a-skywalking-observed-browser/index.html
index 9c16eb8cb19..0599f3d1161 100644
--- a/blog/end-user-tracing-in-a-skywalking-observed-browser/index.html
+++ b/blog/end-user-tracing-in-a-skywalking-observed-browser/index.html
@@ -25,11 +25,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/end-user-tracing-in-a-skywalking-observed-browser/" />
 <meta property="article:published_time" content="2021-03-25T00:00:00+00:00" />
-<meta property="article:modified_time" content="2023-01-09T18:05:38+08:00" />
+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="End-User Tracing in a SkyWalking-Observed Browser">
 <meta itemprop="description" content="This article describes how the skywalking-client-js extends its monitoring to include the browser, providing performance metrics and error collection to the SkyWalking backend.">
 <meta itemprop="datePublished" content="2021-03-25T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2023-01-09T18:05:38+08:00" />
+<meta itemprop="dateModified" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="wordCount" content="1234">
 
 
@@ -503,6 +503,11 @@ designed for microservices, cloud native, and container-based (Docker, Kubernete
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -553,7 +558,7 @@ designed for microservices, cloud native, and container-based (Docker, Kubernete
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -638,7 +643,7 @@ designed for microservices, cloud native, and container-based (Docker, Kubernete
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -4080,6 +4085,12 @@ designed for microservices, cloud native, and container-based (Docker, Kubernete
 
 
 
+
+
+
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+
 
 
 
diff --git a/blog/how-to-use-skywalking-for-distributed-tracing-in-istio/index.html b/blog/how-to-use-skywalking-for-distributed-tracing-in-istio/index.html
index 8d4ef907cda..c2f34fc850c 100644
--- a/blog/how-to-use-skywalking-for-distributed-tracing-in-istio/index.html
+++ b/blog/how-to-use-skywalking-for-distributed-tracing-in-istio/index.html
@@ -25,11 +25,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/how-to-use-skywalking-for-distributed-tracing-in-istio/" />
 <meta property="article:published_time" content="2022-12-14T00:00:00+00:00" />
-<meta property="article:modified_time" content="2023-01-09T18:05:38+08:00" />
+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="How to Use SkyWalking for Distributed Tracing in Istio?">
 <meta itemprop="description" content="This blog will guide you to use SkyWalking for distributed tracing with Istio.">
 <meta itemprop="datePublished" content="2022-12-14T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2023-01-09T18:05:38+08:00" />
+<meta itemprop="dateModified" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="wordCount" content="1987">
 
 
@@ -727,6 +727,11 @@ kubectl delete namespace istio-system
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -777,7 +782,7 @@ kubectl delete namespace istio-system
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -862,7 +867,7 @@ kubectl delete namespace istio-system
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -4312,6 +4317,12 @@ kubectl delete namespace istio-system
 
 
 
+
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+
+
+
 
 
 
diff --git a/blog/index.html b/blog/index.html
index bfa24dde591..b035f9e1a37 100644
--- a/blog/index.html
+++ b/blog/index.html
@@ -215,6 +215,22 @@ if (!doNotTrack) {
 		<h2>Posts in 2023</h2>
 		<ul class="list-unstyled mt-4">
 			
+			<li class="media mb-4">
+				<div class="media-body">
+					<h5 class="mt-0 mb-1"><a href="/blog/ebpf-enhanced-http-observability-l7-metrics-and-tracing/">eBPF enhanced HTTP observability - L7 metrics and tracing</a></h5>
+					<p class="mb-2 mb-md-3"><small class="text-muted">Thursday, January 12, 2023 in Blog</small></p>
+					
+
+
+
+
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+					<p class="pt-0 mt-0">Background Apache SkyWalking is an open-source Application Performance Management system that helps users collect and aggregate logs, traces, metrics, and events for display on a UI. In the previous article, we introduced how to use Apache SkyWalking …</p>
+					<p class="pt-0 mt-0">This article will show how to use Apache SkyWalking with eBPF to enhance metrics and traces in HTTP observability.</p>
+					<p class="pt-0"><a href="/blog/ebpf-enhanced-http-observability-l7-metrics-and-tracing/">Read more</a></p>
+				</div>
+			</li>
+			
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 					<h5 class="mt-0 mb-1"><a href="/blog/2023-01-03-aliyun-copy-page/">[License Issue] Aliyun(阿里云)&#39;s trace analysis service copied SkyWalking&#39;s trace profiling page.</a></h5>
@@ -367,22 +383,6 @@ Apache SkyWalking is an application performance monitor tool for distributed sys
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-				<div class="media-body">
-					<h5 class="mt-0 mb-1"><a href="/blog/2022-04-19-how-to-use-the-java-agent-injector/">How to use the java agent injector?</a></h5>
-					<p class="mb-2 mb-md-3"><small class="text-muted">Tuesday, April 19, 2022 in Blog</small></p>
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-					<p class="pt-0 mt-0">content:  Introduction Features Install SWCK Deploy a demo application Verify the injector Concluding remarks  1. Introduction 1.1 What&rsquo;s SWCK? SWCK is a platform for the SkyWalking user, provisions, upgrades, maintains SkyWalking relevant …</p>
-					<p class="pt-0 mt-0">Introduce how to quickly get started the java agent injector based on SWCK</p>
-					<p class="pt-0"><a href="/blog/2022-04-19-how-to-use-the-java-agent-injector/">Read more</a></p>
-				</div>
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+        </li>
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+            <a href="/tags/http/" class="tag-link">HTTP</a>
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diff --git a/blog/index.xml b/blog/index.xml
index 2287294019f..81340aba1ad 100644
--- a/blog/index.xml
+++ b/blog/index.xml
@@ -13,6 +13,208 @@
       
     
     
+    <item>
+      <title>Blog: eBPF enhanced HTTP observability - L7 metrics and tracing</title>
+      <link>/blog/ebpf-enhanced-http-observability-l7-metrics-and-tracing/</link>
+      <pubDate>Thu, 12 Jan 2023 00:00:00 +0000</pubDate>
+      
+      <guid>/blog/ebpf-enhanced-http-observability-l7-metrics-and-tracing/</guid>
+      <description>
+        
+        
+        &lt;p&gt;&lt;img src=&#34;banner.jpg&#34; alt=&#34;banner&#34;&gt;&lt;/p&gt;
+&lt;h2 id=&#34;background&#34;&gt;Background&lt;/h2&gt;
+&lt;p&gt;Apache SkyWalking is an open-source Application Performance Management system that helps users collect and aggregate logs, traces, metrics, and events for display on a UI. In the &lt;a href=&#34;/blog/diagnose-service-mesh-network-performance-with-ebpf/&#34;&gt;previous article&lt;/a&gt;, we introduced how to use Apache SkyWalking Rover to analyze the network performance issue in the service mesh environment. However, in business scenarios, users often rely on mature layer 7 pro [...]
+&lt;p&gt;This article will show how to use &lt;a href=&#34;https://github.com/apache/skywalking&#34;&gt;Apache SkyWalking&lt;/a&gt; with &lt;a href=&#34;https://ebpf.io/what-is-ebpf/&#34;&gt;eBPF&lt;/a&gt; to enhance metrics and traces in HTTP observability.&lt;/p&gt;
+&lt;h2 id=&#34;http-protocol-analysis&#34;&gt;HTTP Protocol Analysis&lt;/h2&gt;
+&lt;p&gt;HTTP is one of the most common Layer 7 protocols and is usually used to provide services to external parties and for inter-system communication. In the following sections, we will show how to identify and analyze HTTP/1.x protocols.&lt;/p&gt;
+&lt;h3 id=&#34;protocol-identification&#34;&gt;Protocol Identification&lt;/h3&gt;
+&lt;p&gt;In HTTP/1.x, the client and server communicate through a single file descriptor (FD) on each side. Figure 1 shows the process of communication involving the following steps:&lt;/p&gt;
+&lt;ol&gt;
+&lt;li&gt;Connect/accept: The client establishes a connection with the HTTP server, or the server accepts a connection from the client.&lt;/li&gt;
+&lt;li&gt;Read/write (multiple times): The client or server reads and writes HTTPS requests and responses. A single request-response pair occurs within the same connection on each side.&lt;/li&gt;
+&lt;li&gt;Close: The client and server close the connection.&lt;/li&gt;
+&lt;/ol&gt;
+&lt;p&gt;To obtain HTTP content, it’s necessary to read it from the second step of this process. As defined in the &lt;a href=&#34;http://rfc-editor.org/rfc/rfc2068.html&#34;&gt;RFC&lt;/a&gt;, the content is contained within the data of the Layer 4 protocol and can be obtained by parsing the data. The request and response pair can be correlated because they both occur within the same connection on each side.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;f1.png&#34; alt=&#34;Figure 1: HTTP communication timeline.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 1: HTTP communication timeline.&lt;/em&gt;&lt;/p&gt;
+&lt;h3 id=&#34;http-pipeline&#34;&gt;HTTP Pipeline&lt;/h3&gt;
+&lt;p&gt;&lt;a href=&#34;https://en.wikipedia.org/wiki/HTTP_pipelining&#34;&gt;HTTP pipelining&lt;/a&gt; is a feature of HTTP/1.1 that enables multiple HTTP requests to be sent over a single TCP connection without waiting for the corresponding responses. This feature is important because it ensures that the order of the responses on the server side matches the order of the requests.&lt;/p&gt;
+&lt;p&gt;Figure 2 illustrates how this works. Consider the following scenario: an HTTP client sends multiple requests to a server, and the server responds by sending the HTTP responses in the same order as the requests. This means that the first request sent by the client will receive the first response from the server, the second request will receive the second response, and so on.&lt;/p&gt;
+&lt;p&gt;When designing HTTP parsing, we should follow this principle by adding request data to a list and removing the first item when parsing a response. This ensures that the responses are processed in the correct order.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;f2.png&#34; alt=&#34;Figure 2: HTTP/1.1  pipeline.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 2: HTTP/1.1  pipeline.&lt;/em&gt;&lt;/p&gt;
+&lt;h3 id=&#34;metrics&#34;&gt;Metrics&lt;/h3&gt;
+&lt;p&gt;Based on the identification of the HTTP content and process topology diagram mentioned in the previous article, we can combine these two to generate process-to-process metrics data.&lt;/p&gt;
+&lt;p&gt;Figure 3 shows the metrics that currently support the analysis between the two processes. Based on the HTTP request and response data, we can analyze the following data:&lt;/p&gt;
+&lt;table&gt;
+&lt;thead&gt;
+&lt;tr&gt;
+&lt;th&gt;&lt;strong&gt;Metrics Name&lt;/strong&gt;&lt;/th&gt;
+&lt;th&gt;&lt;strong&gt;Type&lt;/strong&gt;&lt;/th&gt;
+&lt;th&gt;&lt;strong&gt;Unit&lt;/strong&gt;&lt;/th&gt;
+&lt;th&gt;&lt;strong&gt;Description&lt;/strong&gt;&lt;/th&gt;
+&lt;/tr&gt;
+&lt;/thead&gt;
+&lt;tbody&gt;
+&lt;tr&gt;
+&lt;td&gt;Request CPM(Call Per Minute)&lt;/td&gt;
+&lt;td&gt;Counter&lt;/td&gt;
+&lt;td&gt;count&lt;/td&gt;
+&lt;td&gt;The HTTP request count&lt;/td&gt;
+&lt;/tr&gt;
+&lt;tr&gt;
+&lt;td&gt;Response Status CPM(Call Per Minute)&lt;/td&gt;
+&lt;td&gt;Counter&lt;/td&gt;
+&lt;td&gt;count&lt;/td&gt;
+&lt;td&gt;The count of per HTTP response status code&lt;/td&gt;
+&lt;/tr&gt;
+&lt;tr&gt;
+&lt;td&gt;Request Package Size&lt;/td&gt;
+&lt;td&gt;Counter/Histogram&lt;/td&gt;
+&lt;td&gt;Byte&lt;/td&gt;
+&lt;td&gt;The request package size&lt;/td&gt;
+&lt;/tr&gt;
+&lt;tr&gt;
+&lt;td&gt;Response Package Size&lt;/td&gt;
+&lt;td&gt;Counter/Histogram&lt;/td&gt;
+&lt;td&gt;Byte&lt;/td&gt;
+&lt;td&gt;The response package size&lt;/td&gt;
+&lt;/tr&gt;
+&lt;tr&gt;
+&lt;td&gt;Client Duration&lt;/td&gt;
+&lt;td&gt;Counter/Histogram&lt;/td&gt;
+&lt;td&gt;Millisecond&lt;/td&gt;
+&lt;td&gt;The duration of single HTTP response on the client side&lt;/td&gt;
+&lt;/tr&gt;
+&lt;tr&gt;
+&lt;td&gt;Server Duration&lt;/td&gt;
+&lt;td&gt;Counter/Histogram&lt;/td&gt;
+&lt;td&gt;Millisecond&lt;/td&gt;
+&lt;td&gt;The duration of single HTTP response on the server side&lt;/td&gt;
+&lt;/tr&gt;
+&lt;/tbody&gt;
+&lt;/table&gt;
+&lt;p&gt;&lt;img src=&#34;f3.png&#34; alt=&#34;Figure 3: Process-to-process metrics.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 3: Process-to-process metrics.&lt;/em&gt;&lt;/p&gt;
+&lt;h2 id=&#34;http-and-trace&#34;&gt;HTTP and Trace&lt;/h2&gt;
+&lt;p&gt;During the HTTP process, if we unpack the HTTP requests and responses from raw data, we can use this data to correlate with the existing tracing system.&lt;/p&gt;
+&lt;h3 id=&#34;trace-context-identification&#34;&gt;Trace Context Identification&lt;/h3&gt;
+&lt;p&gt;In order to track the flow of requests between multiple services, the trace system usually creates a trace context when a request enters a service and passes it along to other services during the request-response process. For example, when an HTTP request is sent to another server, the trace context is included in the request header.&lt;/p&gt;
+&lt;p&gt;Figure 4 displays the raw content of an HTTP request intercepted by Wireshark. The trace context information generated by the Zipkin Tracing system can be identified by the “X-B3” prefix in the header. By using eBPF to intercept the trace context in the HTTP header, we can connect the current request with the trace system.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;f4.png&#34; alt=&#34;Figure 4: View of HTTP headers in Wireshark.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 4: View of HTTP headers in Wireshark.&lt;/em&gt;&lt;/p&gt;
+&lt;h3 id=&#34;trace-event&#34;&gt;Trace Event&lt;/h3&gt;
+&lt;p&gt;We have added the concept of an &lt;em&gt;event&lt;/em&gt; to traces. An event can be attached to a span and consists of start and end times, tags, and summaries, allowing us to attach any desired information to the Trace.&lt;/p&gt;
+&lt;p&gt;When performing eBPF network profiling, two events can be generated based on the request-response data. Figure 5 illustrates what happens when a service performs an HTTP request with profiling. The trace system generates &lt;em&gt;trace context&lt;/em&gt; information and sends it in the request. When the service executes in the kernel, we can generate an event for the corresponding trace span by interacting with the request-response data and execution time in the kernel space.&l [...]
+&lt;p&gt;Previously, we could only observe the execution status in the user space. However, by combining traces and eBPF technologies, we can now also get more information about the current trace in the kernel space, which would impact less performance for the target service if we do similar things in the tracing SDK and agent.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;f5.png&#34; alt=&#34;Figure 5: Logical view of profiling an HTTP request and response.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 5: Logical view of profiling an HTTP request and response.&lt;/em&gt;&lt;/p&gt;
+&lt;h3 id=&#34;sampling&#34;&gt;Sampling&lt;/h3&gt;
+&lt;p&gt;To ensure efficient data storage and minimize unnecessary data sampling, we use a sampling mechanism for traces in our system. This mechanism triggers sampling only when certain conditions are met. We also provide a list of the top &lt;em&gt;N&lt;/em&gt; traces, which allows users to quickly access the relevant request information for a specific trace.&lt;/p&gt;
+&lt;p&gt;To help users easily identify and analyze relevant events, we offer three different sampling rules:&lt;/p&gt;
+&lt;ol&gt;
+&lt;li&gt;&lt;strong&gt;Slow Traces&lt;/strong&gt;: Sampling is triggered when the response time for a request exceeds a specified threshold.&lt;/li&gt;
+&lt;li&gt;&lt;strong&gt;Response Status [400, 500)&lt;/strong&gt;: Sampling is triggered when the response status code is greater than or equal to 400 and less than 500.&lt;/li&gt;
+&lt;li&gt;&lt;strong&gt;Response Status [500, 600)&lt;/strong&gt;: Sampling is triggered when the response status code is greater than or equal to 500 and less than 600.&lt;/li&gt;
+&lt;/ol&gt;
+&lt;p&gt;In addition, we recognize that not all request or response raw data may be necessary for analysis. For example, users may be more interested in requesting data when trying to identify performance issues, while they may be more interested in response data when troubleshooting errors. As such, we also provide configuration options for request or response events to allow users to specify which type of data they would like to sample.&lt;/p&gt;
+&lt;h2 id=&#34;profiling-in-a-service-mesh&#34;&gt;Profiling in a Service Mesh&lt;/h2&gt;
+&lt;p&gt;The SkyWalking and SkyWalking Rover projects have already implemented the HTTP protocol &lt;em&gt;analyze&lt;/em&gt; and &lt;em&gt;trace&lt;/em&gt; associations. How do they perform when running in a service mesh environment?&lt;/p&gt;
+&lt;h3 id=&#34;deployment&#34;&gt;Deployment&lt;/h3&gt;
+&lt;p&gt;Figure 6 demonstrates the deployment of SkyWalking and SkyWalking Rover in a service mesh environment. SkyWalking Rover is deployed as a DaemonSet on each machine where a service is located and communicates with the SkyWalking backend cluster. It automatically recognizes the services on the machine and reports metadata information to the SkyWalking backend cluster. When a new network profiling task arises, SkyWalking Rover senses the task and analyzes the designated processes, c [...]
+&lt;p&gt;&lt;img src=&#34;f6.png&#34; alt=&#34;Figure 6: SkyWalking rover deployment topology in a service mesh.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 6: SkyWalking rover deployment topology in a service mesh.&lt;/em&gt;&lt;/p&gt;
+&lt;h3 id=&#34;tracing-systems&#34;&gt;Tracing Systems&lt;/h3&gt;
+&lt;p&gt;Starting from version 9.3.0, the SkyWalking backend fully supports all functions in the Zipkin server. Therefore, the SkyWalking backend can collect traces from both the SkyWalking and Zipkin protocols. Similarly, SkyWalking Rover can identify and analyze trace context in both the SkyWalking and Zipkin trace systems. In the following two sections, network analysis results will be displayed in the SkyWalking and Zipkin UI respectively.&lt;/p&gt;
+&lt;h4 id=&#34;skywalking&#34;&gt;SkyWalking&lt;/h4&gt;
+&lt;p&gt;When SkyWalking performs network profiling, similar to the TCP metrics in the &lt;a href=&#34;/blog/diagnose-service-mesh-network-performance-with-ebpf/&#34;&gt;previous article&lt;/a&gt;, the SkyWalking UI will first display the topology between processes. When you open the dashboard of the line representing the traffic metrics between processes, you can see the metrics of HTTP traffic from the “HTTP/1.x” tab and the sampled HTTP requests with tracing in the “HTTP Requests” tab [...]
+&lt;p&gt;As shown in Figure 7, there are three lists in the tab, each corresponding to a condition in the event sampling rules. Each list displays the traces that meet the pre-specified conditions. When you click on an item in the trace list, you can view the complete trace.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;f7.png&#34; alt=&#34;Figure 7: Sampled HTTP requests within tracing context.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 7: Sampled HTTP requests within tracing context.&lt;/em&gt;&lt;/p&gt;
+&lt;p&gt;When you click on an item in the trace list, you can quickly view the specified trace. In Figure 8, we can see that in the current service-related span, there is a tag with a number indicating how many HTTP events are related to that trace span.&lt;/p&gt;
+&lt;p&gt;Since we are in a service mesh environment, each service involves interacting with Envoy. Therefore, the current span includes Envoy’s request and response information. Additionally, since the current service has both incoming and outgoing requests, there are events in the corresponding span.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;f8.png&#34; alt=&#34;Figure 8: Events in the trace detail.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 8: Events in the trace detail.&lt;/em&gt;&lt;/p&gt;
+&lt;p&gt;When the span is clicked, the details of the span will be displayed. If there are events in the current span, the relevant event information will be displayed on a time axis. As shown in Figure 9, there are a total of 6 related events in the current Span. Each event represents a data sample of an HTTP request/response. One of the events spans multiple time ranges, indicating a longer system call time. It may be due to a blocked system call, depending on the implementation detail [...]
+&lt;p&gt;&lt;img src=&#34;f9.png&#34; alt=&#34;Figure 9: Events in one trace span.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 9: Events in one trace span.&lt;/em&gt;&lt;/p&gt;
+&lt;p&gt;Finally, we can click on a specific event to see its complete information. As shown in Figure 10, it displays the sampling information of a request, including the SkyWalking trace context protocol contained in the request header from the HTTP raw data. The raw request data allows you to quickly re-request the request to solve any issues.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;f10.png&#34; alt=&#34;Figure 10: The detail of the event.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 10: The detail of the event.&lt;/em&gt;&lt;/p&gt;
+&lt;h4 id=&#34;zipkin&#34;&gt;Zipkin&lt;/h4&gt;
+&lt;p&gt;Zipkin is one of the most widely used distributed tracing systems in the world. SkyWalking can function as an &lt;a href=&#34;https://zipkin.io/pages/extensions_choices.html&#34;&gt;alternative server&lt;/a&gt; to provide advanced features for Zipkin users. Here, we use this way to bring the feature into the Zipkin ecosystem out-of-box. The new events would also be treated as a kind of Zipkin’s tags and annotations.&lt;/p&gt;
+&lt;p&gt;To add events to a Zipkin span, we need to do the following:&lt;/p&gt;
+&lt;ol&gt;
+&lt;li&gt;Split the start and end times of each event into two annotations with a canonical name.&lt;/li&gt;
+&lt;li&gt;Add the sampled HTTP raw data from the event to the Zipkin span tags, using the same event name for corresponding purposes.&lt;/li&gt;
+&lt;/ol&gt;
+&lt;p&gt;Figures 11 and 12 show annotations and tags in the same span. In these figures, we can see that the span includes at least two events with the same event name and sequence suffix (e.g., “Start/Finished HTTP Request/Response Sampling-x” in the figure). Both events have separate timestamps to represent their relative times within the span. In the tags, the data content of the corresponding event is represented by the event name and sequence number, respectively.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;f11.png&#34; alt=&#34;Figure 11: Event timestamp in the Zipkin span annotation.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 11: Event timestamp in the Zipkin span annotation.&lt;/em&gt;&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;f12.png&#34; alt=&#34;Figure 12: Event raw data in the Zipkin span tag.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 12: Event raw data in the Zipkin span tag.&lt;/em&gt;&lt;/p&gt;
+&lt;h2 id=&#34;demo&#34;&gt;Demo&lt;/h2&gt;
+&lt;p&gt;In this section, we demonstrate how to perform network profiling in a service mesh and complete metrics collection and HTTP raw data sampling. To follow along, you will need a running Kubernetes environment.&lt;/p&gt;
+&lt;h3 id=&#34;deploy-skywalking-showcase&#34;&gt;Deploy SkyWalking Showcase&lt;/h3&gt;
+&lt;p&gt;SkyWalking Showcase contains a complete set of example services and can be monitored using SkyWalking. For more information, please check the &lt;a href=&#34;https://skywalking.apache.org/docs/skywalking-showcase/next/readme/&#34;&gt;official documentation&lt;/a&gt;.&lt;/p&gt;
+&lt;p&gt;In this demo, we only deploy service, the latest released SkyWalking OAP, and UI.&lt;/p&gt;
+&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-bash&#34; data-lang=&#34;bash&#34;&gt;&lt;span style=&#34;color:#0086b3&#34;&gt;export&lt;/span&gt; &lt;span style=&#34;color:#008080&#34;&gt;SW_OAP_IMAGE&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;=&lt;/span&gt;apache/skywalking-oap-server:9.3.0
+&lt;span style=&#34;color:#0086b3&#34;&gt;export&lt;/span&gt; &lt;span style=&#34;color:#008080&#34;&gt;SW_UI_IMAGE&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;=&lt;/span&gt;apache/skywalking-ui:9.3.0
+&lt;span style=&#34;color:#0086b3&#34;&gt;export&lt;/span&gt; &lt;span style=&#34;color:#008080&#34;&gt;SW_ROVER_IMAGE&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;=&lt;/span&gt;apache/skywalking-rover:0.4.0
+
+&lt;span style=&#34;color:#0086b3&#34;&gt;export&lt;/span&gt; &lt;span style=&#34;color:#008080&#34;&gt;FEATURE_FLAGS&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;=&lt;/span&gt;mesh-with-agent,single-node,elasticsearch,rover
+make deploy.kubernetes
+&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;After deployment is complete, please run the following script to open SkyWalking UI: http://localhost:8080/.&lt;/p&gt;
+&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-bash&#34; data-lang=&#34;bash&#34;&gt;kubectl port-forward svc/ui 8080:8080 --namespace default
+&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h3 id=&#34;start-network-profiling-task&#34;&gt;Start Network Profiling Task&lt;/h3&gt;
+&lt;p&gt;Currently, we can select the specific instances that we wish to monitor by clicking the &lt;strong&gt;Data Plane&lt;/strong&gt; item in the &lt;strong&gt;Service Mesh&lt;/strong&gt; panel and the &lt;strong&gt;Service&lt;/strong&gt; item in the &lt;strong&gt;Kubernetes&lt;/strong&gt; panel.&lt;/p&gt;
+&lt;p&gt;In figure 13, we have selected an instance with a list of tasks in the network profiling tab.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;f13.png&#34; alt=&#34;Figure 13: Network Profiling tab in the Data Plane.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 13: Network Profiling tab in the Data Plane.&lt;/em&gt;&lt;/p&gt;
+&lt;p&gt;When we click the Start button, as shown in Figure 14, we need to specify the sampling rules for the profiling task. The sampling rules consist of one or more rules, each of which is distinguished by a different URI regular expression. When the HTTP request URI matches the regular expression, the rule is used. If the URI regular expression is empty, the default rule is used. Using multiple rules can help us make different sampling configurations for different requests.&lt;/p&gt;
+&lt;p&gt;Each rule has three parameters to determine if sampling is needed:&lt;/p&gt;
+&lt;ol&gt;
+&lt;li&gt;&lt;strong&gt;Minimal Request Duration (ms)&lt;/strong&gt;: requests with a response time exceeding the specified time will be sampled.&lt;/li&gt;
+&lt;li&gt;&lt;strong&gt;Sampling response status code between 400 and 499&lt;/strong&gt;: all status codes in the range [400-499) will be sampled.&lt;/li&gt;
+&lt;li&gt;&lt;strong&gt;Sampling response status code between 500 and 599&lt;/strong&gt;: all status codes in the range [500-599) will be sampled.&lt;/li&gt;
+&lt;/ol&gt;
+&lt;p&gt;Once the sampling configuration is complete, we can create the task.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;f14.png&#34; alt=&#34;Figure 14: Create network profiling task page.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 14: Create network profiling task page.&lt;/em&gt;&lt;/p&gt;
+&lt;h3 id=&#34;done&#34;&gt;Done!&lt;/h3&gt;
+&lt;p&gt;After a few seconds, you will see the process topology appear on the right side of the page.&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;f15.png&#34; alt=&#34;Figure 15&#34;&gt;&lt;/p&gt;
+&lt;p&gt;When you click on the line between processes, you can view the data between the two processes, which is divided into three tabs:&lt;/p&gt;
+&lt;ol&gt;
+&lt;li&gt;&lt;strong&gt;TCP&lt;/strong&gt;: displays TCP-related metrics.&lt;/li&gt;
+&lt;li&gt;&lt;strong&gt;HTTP/1.x&lt;/strong&gt;: displays metrics in the HTTP 1 protocol.&lt;/li&gt;
+&lt;li&gt;&lt;strong&gt;HTTP Requests&lt;/strong&gt;: displays the analyzed request and saves it to a list according to the sampling rule.&lt;/li&gt;
+&lt;/ol&gt;
+&lt;p&gt;&lt;img src=&#34;f16.png&#34; alt=&#34;Figure 16: TCP metrics in a network profiling task.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 16: TCP metrics in a network profiling task.&lt;/em&gt;&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;f17.png&#34; alt=&#34;Figure 17: HTTP/1.x metrics in a network profiling task.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 17: HTTP/1.x metrics in a network profiling task.&lt;/em&gt;&lt;/p&gt;
+&lt;p&gt;&lt;img src=&#34;f18.png&#34; alt=&#34;Figure 18: HTTP sampled requests in a network profiling task.&#34;&gt;&lt;/p&gt;
+&lt;p&gt;&lt;em&gt;Figure 18: HTTP sampled requests in a network profiling task.&lt;/em&gt;&lt;/p&gt;
+&lt;h2 id=&#34;conclusion&#34;&gt;Conclusion&lt;/h2&gt;
+&lt;p&gt;In this article, we detailed the overview of how to analyze the Layer 7 HTTP/1.x protocol in network analysis, and how to associate it with existing trace systems. This allows us to extend the scope of data we can observe from just user space to also include kernel-space data.&lt;/p&gt;
+&lt;p&gt;In the future, we will delve further into the analysis of kernel data, such as collecting information on TCP packet size, transmission frequency, network card, and help on enhancing distributed tracing from another perspective.&lt;/p&gt;
+&lt;h2 id=&#34;additional-resources&#34;&gt;Additional Resources&lt;/h2&gt;
+&lt;ol&gt;
+&lt;li&gt;&lt;a href=&#34;https://github.com/apache/skywalking&#34;&gt;SkyWalking Github Repo ›&lt;/a&gt;&lt;/li&gt;
+&lt;li&gt;&lt;a href=&#34;https://github.com/apache/skywalking-rover&#34;&gt;SkyWalking Rover Github Repo ›&lt;/a&gt;&lt;/li&gt;
+&lt;li&gt;&lt;a href=&#34;https://skywalking.apache.org/docs/skywalking-rover/v0.3.0/readme/&#34;&gt;SkyWalking Rover Documentation ›&lt;/a&gt;&lt;/li&gt;
+&lt;li&gt;&lt;a href=&#34;https://skywalking.apache.org/blog/diagnose-service-mesh-network-performance-with-ebpf/&#34;&gt;Diagnose Service Mesh Network Performance with eBPF blog post &amp;gt;&lt;/a&gt;&lt;/li&gt;
+&lt;li&gt;&lt;a href=&#34;https://skywalking.apache.org/docs/main/next/en/concepts-and-designs/profiling/&#34;&gt;SkyWalking Profiling Documentation &amp;gt;&lt;/a&gt;&lt;/li&gt;
+&lt;li&gt;&lt;a href=&#34;https://skywalking.apache.org/docs/main/next/en/api/x-process-propagation-headers-v3/&#34;&gt;SkyWalking Trace Context Propagation &amp;gt;&lt;/a&gt;&lt;/li&gt;
+&lt;li&gt;&lt;a href=&#34;https://github.com/openzipkin/b3-propagation&#34;&gt;Zipkin Trace Context Propagation &amp;gt;&lt;/a&gt;&lt;/li&gt;
+&lt;li&gt;&lt;a href=&#34;https://www.rfc-editor.org/rfc/rfc2068.html&#34;&gt;RFC - Hypertext Transfer Protocol – HTTP/1.1 &amp;gt;&lt;/a&gt;&lt;/li&gt;
+&lt;/ol&gt;
+
+      </description>
+    </item>
+    
     <item>
       <title>Blog: [License Issue] Aliyun(阿里云)&#39;s trace analysis service copied SkyWalking&#39;s trace profiling page.</title>
       <link>/blog/2023-01-03-aliyun-copy-page/</link>
@@ -6759,69 +6961,5 @@ bash build/build.sh
       </description>
     </item>
     
-    <item>
-      <title>Blog: Understand distributed trace easier in the incoming 6-GA</title>
-      <link>/blog/2019-01-01-understand-trace/</link>
-      <pubDate>Tue, 01 Jan 2019 00:00:00 +0000</pubDate>
-      
-      <guid>/blog/2019-01-01-understand-trace/</guid>
-      <description>
-        
-        
-        &lt;h2 id=&#34;background&#34;&gt;Background&lt;/h2&gt;
-&lt;p&gt;Distributed tracing is a necessary part of modern microservices architecture, but how to understand or use distributed tracing data is unclear to some end users. This blog overviews typical distributed tracing use cases with new visualization features in SkyWalking v6. We hope new users will understand more through these examples.&lt;/p&gt;
-&lt;h2 id=&#34;metric-and-topology&#34;&gt;Metric and topology&lt;/h2&gt;
-&lt;p&gt;Trace data underpins in two well known analysis features: &lt;strong&gt;metric&lt;/strong&gt; and &lt;strong&gt;topology&lt;/strong&gt;&lt;/p&gt;
-&lt;p&gt;&lt;strong&gt;Metric&lt;/strong&gt; of each service, service instance, endpoint are derived from entry spans in trace. Metrics represent response time performance. So, you could have average response time, 99% response time, success rate, etc. These are broken down by service, service instance, endpoint.&lt;/p&gt;
-&lt;p&gt;&lt;strong&gt;Topology&lt;/strong&gt; represents links between services and is distributed tracing&amp;rsquo;s most attractive feature. Topologies allows all users to understand distributed service relationships and dependencies even when they are varied or complex. This is important as it brings a single view to all interested parties, regardless of if they are a developer, designer or operator.&lt;/p&gt;
-&lt;p&gt;Here&amp;rsquo;s an example topology of 4 projects, including Kafka and two outside dependencies.&lt;/p&gt;
-&lt;p&gt;&lt;img src=&#34;./demo-spring.png&#34; alt=&#34;&#34;&gt;&lt;/p&gt;
-&lt;p align=&#34;center&#34;&gt;Topology in SkyWalking optional UI, RocketBot&lt;/p&gt;
-&lt;h2 id=&#34;trace&#34;&gt;Trace&lt;/h2&gt;
-&lt;p&gt;In a distributed tracing system, we spend a lot of resources(CPU, Memory, Disk and Network) to generate, transport and persistent trace data. Let&amp;rsquo;s try to answer why we do this? What are the typical diagnosis and system performance questions we can answer with trace data?&lt;/p&gt;
-&lt;p&gt;SkyWalking v6 includes two trace views:&lt;/p&gt;
-&lt;ol&gt;
-&lt;li&gt;TreeMode: The first time provided. Help you easier to identify issues.&lt;/li&gt;
-&lt;li&gt;ListMode: Traditional view in time line, also usually seen in other tracing system, such as Zipkin.&lt;/li&gt;
-&lt;/ol&gt;
-&lt;h3 id=&#34;error-occurred&#34;&gt;Error occurred&lt;/h3&gt;
-&lt;p&gt;In the trace view, the easiest part is locating the error, possibly caused by a code exception or network fault. Both ListMode and TreeMode can identify errors, while the span detail screen provides details.&lt;/p&gt;
-&lt;p&gt;&lt;img src=&#34;span-error.png&#34; alt=&#34;&#34;&gt;&lt;/p&gt;
-&lt;p align=&#34;center&#34;&gt;ListMode error span&lt;/p&gt;
-&lt;p&gt;&lt;img src=&#34;span-error-2.png&#34; alt=&#34;&#34;&gt;&lt;/p&gt;
-&lt;p align=&#34;center&#34;&gt;TreeMode error span&lt;/p&gt;
-&lt;h3 id=&#34;slow-span&#34;&gt;Slow span&lt;/h3&gt;
-&lt;p&gt;A high priority feature is identifying the slowest spans in a trace. This uses execution duration captured by application agents. In the old ListMode trace view, parent span almost always includes the child span&amp;rsquo;s duration, due to nesting. In other words, a slow span usually causes its parent to also become slow. In SkyWalking 6, we provide &lt;code&gt;Top 5 of slow span&lt;/code&gt; filter to help you locate the spans directly.&lt;/p&gt;
-&lt;p&gt;&lt;img src=&#34;top5-span.png&#34; alt=&#34;&#34;&gt;&lt;/p&gt;
-&lt;p align=&#34;center&#34;&gt;Top 5 slow span&lt;/p&gt;
-&lt;p&gt;The above screenshot highlights the top 5 slow spans, excluding child span duration. Also, this shows all spans&#39; execution time, which helps identify the slowest ones.&lt;/p&gt;
-&lt;h3 id=&#34;too-many-child-spans&#34;&gt;Too many child spans&lt;/h3&gt;
-&lt;p&gt;In some cases, individual durations are quick, but the trace is still slow, like this one:&lt;/p&gt;
-&lt;p&gt;&lt;img src=&#34;top5-not-clear.png&#34; alt=&#34;&#34;&gt;&lt;/p&gt;
-&lt;p align=&#34;center&#34;&gt;Trace with no slow span&lt;/p&gt;
-&lt;p&gt;To understand if the root problem is related to too many operations, use &lt;code&gt;Top 5 of children span number&lt;/code&gt;. This filter shows the amount of children each span has, highlighting the top 5.&lt;/p&gt;
-&lt;p&gt;&lt;img src=&#34;too-many-child.png&#34; alt=&#34;&#34;&gt;&lt;/p&gt;
-&lt;p align=&#34;center&#34;&gt;13 database accesses of a span&lt;/p&gt;
-&lt;p&gt;In this screenshot, there is a span with 13 children, which are all Database accesses. Also, when you see overview of trace, database cost 1380ms of this 2000ms trace.&lt;/p&gt;
-&lt;p&gt;&lt;img src=&#34;database-long-duration.png&#34; alt=&#34;&#34;&gt;&lt;/p&gt;
-&lt;p align=&#34;center&#34;&gt;1380ms database accesses&lt;/p&gt;
-&lt;p&gt;In this example, the root cause is too many database accesses. This is also typical in other scenarios like too many RPCs or cache accesses.&lt;/p&gt;
-&lt;h3 id=&#34;trace-depth&#34;&gt;Trace depth&lt;/h3&gt;
-&lt;p&gt;Trace depth is also related latency. Like the &lt;a href=&#34;#too-many-child-spans&#34;&gt;too many child spans&lt;/a&gt; scenario, each span latency looks good, but the whole trace is slow.&lt;/p&gt;
-&lt;p&gt;&lt;img src=&#34;deep-trace-1.png&#34; alt=&#34;&#34;&gt;&lt;/p&gt;
-&lt;p align=&#34;center&#34;&gt;Trace depth&lt;/p&gt;
-&lt;p&gt;Here, the slowest spans are less than 500ms, which are not too slow for a 2000ms trace. When you see the first line, there are four different colors representing four services involved in this distributed trace. Every one of them costs 100~400ms. For all four, there nearly 2000ms. From here, we know this slow trace is caused by 3 RPCs in a serial sequence.&lt;/p&gt;
-&lt;h2 id=&#34;at-the-end&#34;&gt;At the end&lt;/h2&gt;
-&lt;p&gt;Distributed tracing and APM tools help users identify root causes, allowing development and operation teams to optimize accordingly. We hope you enjoyed this, and love Apache SkyWalking and our new trace visualization. If so, &lt;a href=&#34;https://github.com/apache/incubator-skywalking&#34;&gt;give us a star on GitHub&lt;/a&gt; to encourage us.&lt;/p&gt;
-&lt;p&gt;SkyWalking 6 is scheduled to release at the end of January 2019. You can contact the project team through the following channels:&lt;/p&gt;
-&lt;ul&gt;
-&lt;li&gt;Follow &lt;a href=&#34;https://twitter.com/ASFSkyWalking&#34;&gt;SkyWalking twitter&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;Subscribe mailing list: &lt;a href=&#34;mailto:dev@skywalking.apache.org&#34;&gt;dev@skywalking.apache.org&lt;/a&gt; . Send to &lt;a href=&#34;mailto:dev-subscribe@kywalking.apache.org&#34;&gt;dev-subscribe@kywalking.apache.org&lt;/a&gt; to subscribe the mail list.&lt;/li&gt;
-&lt;li&gt;Join &lt;a href=&#34;https://gitter.im/OpenSkywalking/Lobby&#34;&gt;Gitter&lt;/a&gt; room.&lt;/li&gt;
-&lt;/ul&gt;
-
-      </description>
-    </item>
-    
   </channel>
 </rss>
diff --git a/blog/obs-service-mesh-vm-with-sw-and-als/index.html b/blog/obs-service-mesh-vm-with-sw-and-als/index.html
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+++ b/blog/obs-service-mesh-vm-with-sw-and-als/index.html
@@ -25,11 +25,11 @@
 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/obs-service-mesh-vm-with-sw-and-als/" />
 <meta property="article:published_time" content="2021-02-21T00:00:00+00:00" />
-<meta property="article:modified_time" content="2023-01-09T18:05:38+08:00" />
+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="Observe VM Service Meshes with Apache SkyWalking and the Envoy Access Log Service">
 <meta itemprop="description" content="In this tutorial, you can learn how to use Apache SkyWalking for service mesh observability, in Kubernetes and / or in virtual machines.">
 <meta itemprop="datePublished" content="2021-02-21T00:00:00+00:00" />
-<meta itemprop="dateModified" content="2023-01-09T18:05:38+08:00" />
+<meta itemprop="dateModified" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="wordCount" content="1285">
 
 
@@ -465,6 +465,11 @@ to <code>UTC +0</code>.</p>
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -515,7 +520,7 @@ to <code>UTC +0</code>.</p>
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
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@@ -600,7 +605,7 @@ to <code>UTC +0</code>.</p>
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -4042,6 +4047,12 @@ to <code>UTC +0</code>.</p>
 
 
 
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diff --git a/blog/page/2/index.html b/blog/page/2/index.html
index eaf2bafe91e..ed7937a7ea0 100644
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@@ -214,6 +214,22 @@ if (!doNotTrack) {
 		<h2>Posts in 2022</h2>
 		<ul class="list-unstyled mt-4">
 			
+			<li class="media mb-4">
+				<div class="media-body">
+					<h5 class="mt-0 mb-1"><a href="/blog/2022-04-19-how-to-use-the-java-agent-injector/">How to use the java agent injector?</a></h5>
+					<p class="mb-2 mb-md-3"><small class="text-muted">Tuesday, April 19, 2022 in Blog</small></p>
+					
+
+
+
+
+
+					<p class="pt-0 mt-0">content:  Introduction Features Install SWCK Deploy a demo application Verify the injector Concluding remarks  1. Introduction 1.1 What&rsquo;s SWCK? SWCK is a platform for the SkyWalking user, provisions, upgrades, maintains SkyWalking relevant …</p>
+					<p class="pt-0 mt-0">Introduce how to quickly get started the java agent injector based on SWCK</p>
+					<p class="pt-0"><a href="/blog/2022-04-19-how-to-use-the-java-agent-injector/">Read more</a></p>
+				</div>
+			</li>
+			
 			<li class="media mb-4">
 				<div class="media-body">
 					<h5 class="mt-0 mb-1"><a href="/blog/2022-04-14-integrating-skywalking-with-source-code/">Integrating Apache SkyWalking with source code</a></h5>
@@ -366,22 +382,6 @@ Apache APISIX has integrated Apache SkyWaling …</p>
 				</div>
 			</li>
 			
-			<li class="media mb-4">
-				<div class="media-body">
-					<h5 class="mt-0 mb-1"><a href="/blog/2021-09-12-skywalking-python-profiling/">SkyWalking Python Agent Supports Profiling Now</a></h5>
-					<p class="mb-2 mb-md-3"><small class="text-muted">Sunday, September 12, 2021 in Blog</small></p>
-					
-
-
-
-
-
-					<p class="pt-0 mt-0">The Java Agent of Apache SkyWalking has supported profiling since v7.0.0, and it enables users to troubleshoot the root cause of performance issues, and now we bring it into Python Agent. In this blog, we will show you how to use it, and we will …</p>
-					<p class="pt-0 mt-0">This post introduces how to use profiling in SkyWalking Python Agent and the mechanism of profiling.</p>
-					<p class="pt-0"><a href="/blog/2021-09-12-skywalking-python-profiling/">Read more</a></p>
-				</div>
-			</li>
-			
 		</ul>
 		
 	</div>
@@ -500,6 +500,11 @@ Apache APISIX has integrated Apache SkyWaling …</p>
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -550,7 +555,7 @@ Apache APISIX has integrated Apache SkyWaling …</p>
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -635,7 +640,7 @@ Apache APISIX has integrated Apache SkyWaling …</p>
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -4062,6 +4067,12 @@ Apache APISIX has integrated Apache SkyWaling …</p>
 
 
 
+
+
+
+
+
+
 
 
 
diff --git a/blog/page/3/index.html b/blog/page/3/index.html
index b7b2ed3e4ca..94158bb0c7f 100644
--- a/blog/page/3/index.html
+++ b/blog/page/3/index.html
@@ -214,6 +214,22 @@ if (!doNotTrack) {
 		<h2>Posts in 2021</h2>
 		<ul class="list-unstyled mt-4">
 			
+			<li class="media mb-4">
+				<div class="media-body">
+					<h5 class="mt-0 mb-1"><a href="/blog/2021-09-12-skywalking-python-profiling/">SkyWalking Python Agent Supports Profiling Now</a></h5>
+					<p class="mb-2 mb-md-3"><small class="text-muted">Sunday, September 12, 2021 in Blog</small></p>
+					
+
+
+
+
+
+					<p class="pt-0 mt-0">The Java Agent of Apache SkyWalking has supported profiling since v7.0.0, and it enables users to troubleshoot the root cause of performance issues, and now we bring it into Python Agent. In this blog, we will show you how to use it, and we will …</p>
+					<p class="pt-0 mt-0">This post introduces how to use profiling in SkyWalking Python Agent and the mechanism of profiling.</p>
+					<p class="pt-0"><a href="/blog/2021-09-12-skywalking-python-profiling/">Read more</a></p>
+				</div>
+			</li>
+			
 			<li class="media mb-4">
 				<div class="media-body">
 					<h5 class="mt-0 mb-1"><a href="/blog/2021-08-01-skywalking-8-intro/">[Webinar] SkyWalking 8.x Introduction</a></h5>
@@ -364,23 +380,6 @@ From 2020, it has dominated the open source APM market in China, and expanded 
 				</div>
 			</li>
 			
-			<li class="media mb-4">
-				<div class="media-body">
-					<h5 class="mt-0 mb-1"><a href="/blog/2021-02-01-e2e-verifier-design/">[Design] The Verifier of NGE2E</a></h5>
-					<p class="mb-2 mb-md-3"><small class="text-muted">Monday, February 01, 2021 in Blog</small></p>
-					
-
-
-
-
-
-					<p class="pt-0 mt-0">Background The verifier is an important part of the next generation End-to-End Testing framework (NGE2E), which is responsible for verifying whether the actual output satisfies the expected template.
-Design Thinking We will implement the verifier …</p>
-					<p class="pt-0 mt-0">The design of Next Generation End-to-End Testing Framework  Verifier</p>
-					<p class="pt-0"><a href="/blog/2021-02-01-e2e-verifier-design/">Read more</a></p>
-				</div>
-			</li>
-			
 		</ul>
 		
 	</div>
@@ -502,6 +501,11 @@ Design Thinking We will implement the verifier …</p>
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -552,7 +556,7 @@ Design Thinking We will implement the verifier …</p>
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -637,7 +641,7 @@ Design Thinking We will implement the verifier …</p>
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -4064,6 +4068,12 @@ Design Thinking We will implement the verifier …</p>
 
 
 
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diff --git a/blog/page/4/index.html b/blog/page/4/index.html
index 33203063205..a6498971d36 100644
--- a/blog/page/4/index.html
+++ b/blog/page/4/index.html
@@ -214,6 +214,23 @@ if (!doNotTrack) {
 		<h2>Posts in 2021</h2>
 		<ul class="list-unstyled mt-4">
 			
+			<li class="media mb-4">
+				<div class="media-body">
+					<h5 class="mt-0 mb-1"><a href="/blog/2021-02-01-e2e-verifier-design/">[Design] The Verifier of NGE2E</a></h5>
+					<p class="mb-2 mb-md-3"><small class="text-muted">Monday, February 01, 2021 in Blog</small></p>
+					
+
+
+
+
+
+					<p class="pt-0 mt-0">Background The verifier is an important part of the next generation End-to-End Testing framework (NGE2E), which is responsible for verifying whether the actual output satisfies the expected template.
+Design Thinking We will implement the verifier …</p>
+					<p class="pt-0 mt-0">The design of Next Generation End-to-End Testing Framework  Verifier</p>
+					<p class="pt-0"><a href="/blog/2021-02-01-e2e-verifier-design/">Read more</a></p>
+				</div>
+			</li>
+			
 			<li class="media mb-4">
 				<div class="media-body">
 					<h5 class="mt-0 mb-1"><a href="/blog/2021-01-23-tencent-cloud-violates-aplv2/">[Resolved][License Issue] Tencent Cloud TSW service violates the Apache 2.0 License when using SkyWalking.</a></h5>
@@ -366,22 +383,6 @@ Just 11 months ago, on Jan. 20th, 2020, SkyWalking hit the 200 contributors mark
 				</div>
 			</li>
 			
-			<li class="media mb-4">
-				<div class="media-body">
-					<h5 class="mt-0 mb-1"><a href="/blog/2020-11-21-apachecon-obs-shardingsphere/">[Video] Another backend storage solution for the APM system</a></h5>
-					<p class="mb-2 mb-md-3"><small class="text-muted">Saturday, November 21, 2020 in Blog</small></p>
-					
-
-
-
-
-
-					<p class="pt-0 mt-0">The APM system provides the tracing or metrics for distributed systems or microservice architectures. Back to APM themselves, they always need backend storage to store the necessary massive data. What are the features required for backend storage? …</p>
-					<p class="pt-0 mt-0">ApacheCon@Home 2020 Observability Track</p>
-					<p class="pt-0"><a href="/blog/2020-11-21-apachecon-obs-shardingsphere/">Read more</a></p>
-				</div>
-			</li>
-			
 		</ul>
 		
 	</div>
@@ -503,6 +504,11 @@ Just 11 months ago, on Jan. 20th, 2020, SkyWalking hit the 200 contributors mark
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -553,7 +559,7 @@ Just 11 months ago, on Jan. 20th, 2020, SkyWalking hit the 200 contributors mark
         
         <li>
             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -638,7 +644,7 @@ Just 11 months ago, on Jan. 20th, 2020, SkyWalking hit the 200 contributors mark
         
         <li>
             <a href="/tags/trace/" class="tag-link">Trace</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
         </li>
         
         <li>
@@ -4065,6 +4071,12 @@ Just 11 months ago, on Jan. 20th, 2020, SkyWalking hit the 200 contributors mark
 
 
 
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diff --git a/blog/page/5/index.html b/blog/page/5/index.html
index bd07595f687..8259de4cd15 100644
--- a/blog/page/5/index.html
+++ b/blog/page/5/index.html
@@ -214,6 +214,22 @@ if (!doNotTrack) {
 		<h2>Posts in 2020</h2>
 		<ul class="list-unstyled mt-4">
 			
+			<li class="media mb-4">
+				<div class="media-body">
+					<h5 class="mt-0 mb-1"><a href="/blog/2020-11-21-apachecon-obs-shardingsphere/">[Video] Another backend storage solution for the APM system</a></h5>
+					<p class="mb-2 mb-md-3"><small class="text-muted">Saturday, November 21, 2020 in Blog</small></p>
+					
+
+
+
+
+
+					<p class="pt-0 mt-0">The APM system provides the tracing or metrics for distributed systems or microservice architectures. Back to APM themselves, they always need backend storage to store the necessary massive data. What are the features required for backend storage? …</p>
+					<p class="pt-0 mt-0">ApacheCon@Home 2020 Observability Track</p>
+					<p class="pt-0"><a href="/blog/2020-11-21-apachecon-obs-shardingsphere/">Read more</a></p>
+				</div>
+			</li>
+			
 			<li class="media mb-4">
 				<div class="media-body">
 					<h5 class="mt-0 mb-1"><a href="/blog/2020-11-21-apachecon-keynote/">[Video] Apache grows in China</a></h5>
@@ -366,22 +382,6 @@ dingtalk message body …</p>
 				</div>
 			</li>
 			
-			<li class="media mb-4">
-				<div class="media-body">
-					<h5 class="mt-0 mb-1"><a href="/blog/2019-01-01-understand-trace/">Understand distributed trace easier in the incoming 6-GA</a></h5>
-					<p class="mb-2 mb-md-3"><small class="text-muted">Tuesday, January 01, 2019 in Blog</small></p>
-					
-
-
-
-
-
-					<p class="pt-0 mt-0">Background Distributed tracing is a necessary part of modern microservices architecture, but how to understand or use distributed tracing data is unclear to some end users. This blog overviews typical distributed tracing use cases with new …</p>
-					<p class="pt-0 mt-0">Distributed tracing is a necessary part of modern microservices architecture, but how to understand or use distributed tracing data is unclear to some end users. This blog overviews typical distributed tracing use cases with new visualization features in SkyWalking v6.</p>
-					<p class="pt-0"><a href="/blog/2019-01-01-understand-trace/">Read more</a></p>
-				</div>
-			</li>
-			
 		</ul>
 		
 	</div>
@@ -503,6 +503,11 @@ dingtalk message body …</p>
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
         </li>
         
@@ -553,7 +558,7 @@ dingtalk message body …</p>
         
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             <a href="/tags/metric/" class="tag-link">Metric</a>
-            <span class="count">2</span>
+            <span class="count">4</span>
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@@ -638,7 +643,7 @@ dingtalk message body …</p>
         
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             <a href="/tags/trace/" class="tag-link">Trace</a>
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+            <span class="count">4</span>
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diff --git a/blog/page/6/index.html b/blog/page/6/index.html
index 15ca300240e..ea05381f655 100644
--- a/blog/page/6/index.html
+++ b/blog/page/6/index.html
@@ -211,6 +211,27 @@ if (!doNotTrack) {
 <div class="row">
 	<div class="col-12">
 		
+		<h2>Posts in 2019</h2>
+		<ul class="list-unstyled mt-4">
+			
+			<li class="media mb-4">
+				<div class="media-body">
+					<h5 class="mt-0 mb-1"><a href="/blog/2019-01-01-understand-trace/">Understand distributed trace easier in the incoming 6-GA</a></h5>
+					<p class="mb-2 mb-md-3"><small class="text-muted">Tuesday, January 01, 2019 in Blog</small></p>
+					
+
+
+
+
+
+					<p class="pt-0 mt-0">Background Distributed tracing is a necessary part of modern microservices architecture, but how to understand or use distributed tracing data is unclear to some end users. This blog overviews typical distributed tracing use cases with new …</p>
+					<p class="pt-0 mt-0">Distributed tracing is a necessary part of modern microservices architecture, but how to understand or use distributed tracing data is unclear to some end users. This blog overviews typical distributed tracing use cases with new visualization features in SkyWalking v6.</p>
+					<p class="pt-0"><a href="/blog/2019-01-01-understand-trace/">Read more</a></p>
+				</div>
+			</li>
+			
+		</ul>
+		
 		<h2>Posts in 2018</h2>
 		<ul class="list-unstyled mt-4">
 			
@@ -370,6 +391,11 @@ In many big systems, distributed and especially microservice architectures becom
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
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             <a href="/tags/metric/" class="tag-link">Metric</a>
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             <a href="/tags/trace/" class="tag-link">Trace</a>
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diff --git a/blog/skywalking8-4-release/index.html b/blog/skywalking8-4-release/index.html
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@@ -377,6 +377,11 @@ Figure 5: Grouped Service Topology</p>
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
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             <a href="/tags/metric/" class="tag-link">Metric</a>
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             <a href="/tags/trace/" class="tag-link">Trace</a>
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diff --git a/blog/skywalkings-new-storage-feature-based-on-shardingsphere-proxy-mysql-sharding/index.html b/blog/skywalkings-new-storage-feature-based-on-shardingsphere-proxy-mysql-sharding/index.html
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--- a/blog/skywalkings-new-storage-feature-based-on-shardingsphere-proxy-mysql-sharding/index.html
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 <meta property="og:type" content="article" />
 <meta property="og:url" content="/blog/skywalkings-new-storage-feature-based-on-shardingsphere-proxy-mysql-sharding/" />
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+<meta property="article:modified_time" content="2023-01-12T10:24:03+08:00" />
 <meta itemprop="name" content="SkyWalking&#39;s New Storage Feature Based on ShardingSphere-Proxy: MySQL-Sharding">
 <meta itemprop="description" content="Based on MySQL storage, SkyWalking v9.3.0 provides a new storage method: MySQL-Sharding. It supports database and table sharding features thanks to ShardingSphere-Proxy, which is a mature solution for dealing with relational databases’ massive amounts of data.">
 <meta itemprop="datePublished" content="2022-12-06T00:00:00+00:00" />
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@@ -498,6 +498,11 @@ logicTableName_20220908</p>
         
         <li>
             <a href="/tags/ebpf/" class="tag-link">eBPF</a>
+            <span class="count">4</span>
+        </li>
+        
+        <li>
+            <a href="/tags/http/" class="tag-link">HTTP</a>
             <span class="count">2</span>
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             <a href="/tags/trace/" class="tag-link">Trace</a>
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diff --git a/docs/index.html b/docs/index.html
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diff --git a/docs/main/next/en/academy/diagnose-service-mesh-network-performance-with-ebpf/index.html b/docs/main/next/en/academy/diagnose-service-mesh-network-performance-with-ebpf/index.html
index 98fe2098ea6..a90147ca974 100644
--- a/docs/main/next/en/academy/diagnose-service-mesh-network-performance-with-ebpf/index.html
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diff --git a/docs/main/next/en/academy/scaling-with-apache-skywalking/index.html b/docs/main/next/en/academy/scaling-with-apache-skywalking/index.html
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diff --git a/docs/main/next/en/api/browser-http-api-protocol/index.html b/docs/main/next/en/api/browser-http-api-protocol/index.html
index ed0d22e6482..7bb72c56ea6 100644
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diff --git a/docs/main/next/en/api/instance-properties/index.html b/docs/main/next/en/api/instance-properties/index.html
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diff --git a/docs/main/next/en/api/log-data-protocol/index.html b/docs/main/next/en/api/log-data-protocol/index.html
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diff --git a/docs/main/next/en/api/query-protocol/index.html b/docs/main/next/en/api/query-protocol/index.html
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diff --git a/docs/main/next/en/api/trace-data-protocol-v3/index.html b/docs/main/next/en/api/trace-data-protocol-v3/index.html
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 <meta itemprop="name" content="9.4.0">
 <meta itemprop="description" content="9.4.0 Project  Bump up Zipkin and Zipkin lens UI dependency to 2.24.0.  OAP Server  Add ServerStatusService in the core module to provide a new way to expose booting status to other modules. Adds Micrometer as a new component.(ID=141) Refactor session cache in MetricsPersistentWorker. Cache enhancement - don&rsquo;t read new metrics from database in minute dimensionality.   // When // (1) the time bucket of the server&#39;s latest stability status is [...]
 
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 <li>Update <code>monitoring MySQL document</code> to add the <code>MariaDB</code> part.</li>
 <li>Reorganize the protocols docs to a more clear API docs.</li>
 <li>Add documentation about replacing Zipkin server with SkyWalking OAP.</li>
+<li>Add Lens UI relative docs in Zipkin trace section.</li>
 </ul>
 <p>All issues and pull requests are <a href="https://github.com/apache/skywalking/milestone/160?closed=1">here</a></p>
 
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-<p><code>layer</code> extracts the <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/Layer.java">layer</a> from the <code>parsed</code> result, and set it into the <code>LogData</code>, which will be persisted (if
+<p><code>layer</code> extracts the <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/Layer.java">layer</a> from the <code>parsed</code> result, and set it into the <code>LogData</code>, which will be persisted (if
 not dropped) and is used to associate with service.</p>
 <ul>
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 <p>If users want to get the latest time from <code>last_server_state_sync_time_in_seconds</code>:</p>
 <pre><code>last_server_state_sync_time_in_seconds.tagEqual('production', 'catalog').downsampling(LATEST)
 </code></pre><h2 id="metric-level-function">Metric level function</h2>
-<p>They extract level relevant labels from metric labels, then informs the meter-system the level and <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/Layer.java">layer</a> to which this metric belongs.</p>
+<p>They extract level relevant labels from metric labels, then informs the meter-system the level and <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/Layer.java">layer</a> to which this metric belongs.</p>
 <ul>
 <li><code>service([svc_label1, svc_label2...], Layer)</code> extracts service level labels from the array argument, extracts layer from <code>Layer</code> argument.</li>
 <li><code>instance([svc_label1, svc_label2...], [ins_label1, ins_label2...], Layer, Closure&lt;Map&lt;String, String&gt;&gt; propertiesExtractor)</code> extracts service level labels from the first array argument,
@@ -1949,7 +1949,7 @@ extracts <code>Service</code> labels from the first array argument, extracts <co
 <p>The OAP can load the configuration at bootstrap. If the new configuration is not well-formed, the OAP fails to start up. The files
 are located at <code>$CLASSPATH/otel-rules</code>, <code>$CLASSPATH/meter-analyzer-config</code>, <code>$CLASSPATH/envoy-metrics-rules</code> and <code>$CLASSPATH/zabbix-rules</code>.</p>
 <p>The file is written in YAML format, defined by the scheme described below. Brackets indicate that a parameter is optional.</p>
-<p>A full example can be found <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/oap-server/server-starter/src/main/resources/otel-rules/oap.yaml">here</a></p>
+<p>A full example can be found <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/oap-server/server-starter/src/main/resources/otel-rules/oap.yaml">here</a></p>
 <p>Generic placeholders are defined as follows:</p>
 <ul>
 <li><code>&lt;string&gt;</code>: A regular string.</li>
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 </span><span style="color:#bbb"></span><span style="color:#998;font-style:italic"># MAL expression.</span><span style="color:#bbb">
 </span><span style="color:#bbb"></span><span style="color:#000080">exp</span>:<span style="color:#bbb"> </span>&lt;string&gt;<span style="color:#bbb">
 </span></code></pre></div><h2 id="more-examples">More Examples</h2>
-<p>Please refer to <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/oap-server/server-starter/src/main/resources/otel-rules/oap.yaml">OAP Self-Observability</a>.</p>
+<p>Please refer to <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/oap-server/server-starter/src/main/resources/otel-rules/oap.yaml">OAP Self-Observability</a>.</p>
 
 
 
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 	<h1 id="v9-upgrade">V9 upgrade</h1>
-<p>Starting from v9, SkyWalking introduces the new core concept <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/Layer.java"><strong>Layer</strong></a>.
+<p>Starting from v9, SkyWalking introduces the new core concept <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/Layer.java"><strong>Layer</strong></a>.
 A layer represents an abstract framework in computer science, such as Operating System(OS_LINUX layer),
 Kubernetes(k8s layer). This kind of layer would be catalogs on the new <a href="https://github.com/apache/skywalking-booster-ui">booster UI</a> of various services/instances detected by different technologies.
 The query-protocol <a href="https://github.com/apache/skywalking-query-protocol/blob/master/metadata-v2.graphqls">metadata-v2</a> has been used.
@@ -1790,8 +1790,8 @@ The compatibility with previous releases is as below.</p>
 <h2 id="incompatibility">Incompatibility</h2>
 <ol>
 <li>The <a href="https://github.com/apache/skywalking-query-protocol/blob/master/ui-configuration.graphqls">UI configuration protocol</a> has been changed by following the design of new <a href="https://github.com/apache/skywalking-booster-ui">booster UI</a>. So, the RocketBot UI can&rsquo;t work with the v9 backend. You need to remove <code>ui_template</code> index/template/table in your chosen storage, and reboot OAP in <code>default</code> or <code>init</code> mode.</li>
-<li>MAL: <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/docs/en/concepts-and-designs/mal.md">metric level function</a> add an required argument <code>Layer</code>. Previous MAL expressions should add this argument.</li>
-<li>LAL: <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/docs/en/concepts-and-designs/lal.md">Extractor</a> add function <code>layer</code>. If don&rsquo;t set it manual, the default layer is <code>GENERAL</code> and the logs from <code>ALS</code> the
+<li>MAL: <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/docs/en/concepts-and-designs/mal.md">metric level function</a> add an required argument <code>Layer</code>. Previous MAL expressions should add this argument.</li>
+<li>LAL: <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/docs/en/concepts-and-designs/lal.md">Extractor</a> add function <code>layer</code>. If don&rsquo;t set it manual, the default layer is <code>GENERAL</code> and the logs from <code>ALS</code> the
 default layer is <code>mesh</code>.</li>
 <li>Storage:Add <code>service_id</code>, <code>short_name</code> and <code>layer</code> columns to table <code>ServiceTraffic</code>.
 These data would be incompatible with previous versions.
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 <h2 id="profile-data-debugging">Profile data debugging</h2>
-<p>Please follow the <a href="../backend-profile-export#export-using-command-line">exporter tool</a> to package profile data. Unzip the profile data and use <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/oap-server/server-tools/profile-exporter/tool-profile-snapshot-bootstrap/src/test/java/org/apache/skywalking/oap/server/tool/profile/exporter/ProfileExportedAnalyze.java">analyzer main function</a> to run it.</p>
+<p>Please follow the <a href="../backend-profile-export#export-using-command-line">exporter tool</a> to package profile data. Unzip the profile data and use <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/oap-server/server-tools/profile-exporter/tool-profile-snapshot-bootstrap/src/test/java/org/apache/skywalking/oap/server/tool/profile/exporter/ProfileExportedAnalyze.java">analyzer main function</a> to run it.</p>
 
 
 
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 </blockquote>
 <h3 id="building-docker-images">Building docker images</h3>
 <p>You can build docker images of <code>backend</code> and <code>ui</code> with <code>Makefile</code> located in root folder.</p>
-<p>Refer to <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/docker">Build docker image</a> for more details.</p>
+<p>Refer to <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/docker">Build docker image</a> for more details.</p>
 <h2 id="setting-up-your-intellij-idea">Setting up your IntelliJ IDEA</h2>
 <p><strong>NOTE</strong>: If you clone the codes from GitHub, please make sure that you have finished steps 1 to 3 in section <strong><a href="#building-from-github">Build from GitHub</a></strong>. If you download the source codes from the official website of SkyWalking, please make sure that you have followed the steps in section <strong><a href="#building-from-apache-source-code-release">Build from Apache source code release</a></strong>.</p>
 <ol>
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 <h3 id="set-up">Set up</h3>
 <ol>
 <li>Enable APISIX <a href="https://apisix.apache.org/docs/apisix/plugins/prometheus/">APISIX Prometheus plugin</a> .</li>
-<li>Set up <a href="https://opentelemetry.io/docs/collector/getting-started/#docker">OpenTelemetry Collector </a>. For details on Prometheus Receiver in OpenTelemetry Collector, refer to <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/test/e2e-v2/cases/apisix/otel-collector/otel-collector-config.yaml">here</a>.</li>
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 </span><span style="color:#bbb">     </span><span style="color:#998;font-style:italic"># ... take care of other analyzers</span><span style="color:#bbb">
 </span><span style="color:#bbb">     </span><span style="color:#000080">meterAnalyzerActiveFiles</span>:<span style="color:#bbb"> </span>${SW_METER_ANALYZER_ACTIVE_FILES:your-custom-meter-conf-without-ext-name}<span style="color:#bbb"> </span><span style="color:#998;font-style:italic"># The multiple files should be separated by &#34;,&#34;</span><span style="color:#bbb">
 </span></code></pre></div><p>Meter-analyzer-config file is written in YAML format, defined by the scheme described below. Brackets indicate that a parameter is optional.</p>
-<p>All available meter analysis scripts could be found <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/oap-server/server-starter/src/main/resources/meter-analyzer-config/">here</a>.</p>
+<p>All available meter analysis scripts could be found <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/oap-server/server-starter/src/main/resources/meter-analyzer-config/">here</a>.</p>
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-<p>An example can be found <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/oap-server/server-starter/src/main/resources/meter-analyzer-config/spring-micrometer.yaml">here</a>.
+<p>An example can be found <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/oap-server/server-starter/src/main/resources/meter-analyzer-config/spring-micrometer.yaml">here</a>.
 If you&rsquo;re using Spring MicroMeter Observations, see <a href="../micrometer-observations">Spring MicroMeter Observations APIs</a>.</p>
 <h3 id="meters-configuration">Meters configuration</h3>
 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-yaml" data-lang="yaml"><span style="color:#998;font-style:italic"># initExp is the expression that initializes the current configuration file</span><span style="color:#bbb">
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 <li>Set up <a href="https://github.com/prometheus/mysqld_exporter#using-docker">mysqld_exporter</a>.</li>
-<li>Set up <a href="https://opentelemetry.io/docs/collector/getting-started/#docker">OpenTelemetry Collector </a>. For details on Prometheus Receiver in OpenTelemetry Collector, refer to <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/test/e2e-v2/cases/mysql/prometheus-mysql-exporter/otel-collector-config.yaml">here</a>.</li>
+<li>Set up <a href="https://opentelemetry.io/docs/collector/getting-started/#docker">OpenTelemetry Collector </a>. For details on Prometheus Receiver in OpenTelemetry Collector, refer to <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/test/e2e-v2/cases/mysql/prometheus-mysql-exporter/otel-collector-config.yaml">here</a>.</li>
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-<li>Config fluentbit from <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/test/e2e-v2/cases/mysql/mysql-slowsql/fluent-bit.conf">here</a> for MySQL or <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/test/e2e-v2/cases/mariadb/mariadb-slowsql/fluent-bit.conf">here</a> for MariaDB.</li>
-<li>Enable slow log from <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/test/e2e-v2/cases/mysql/mysql-slowsql/my.cnf">here</a> for MySQL or <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/test/e2e-v2/cases/mariadb/mariadb-slowsql/my.cnf">here</a> for MariaDB.</li>
+<li>Config fluentbit from <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/test/e2e-v2/cases/mysql/mysql-slowsql/fluent-bit.conf">here</a> for MySQL or <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/test/e2e-v2/cases/mariadb/mariadb-slowsql/fluent-bit.conf">here</a> for MariaDB.</li>
+<li>Enable slow log from <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/test/e2e-v2/cases/mysql/mysql-slowsql/my.cnf">here</a> for MySQL or <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/test/e2e-v2/cases/mariadb/mariadb-slowsql/my.cnf">here</a> for MariaDB.</li>
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+<li>Set up <a href="https://opentelemetry.io/docs/collector/getting-started/#docker">OpenTelemetry Collector </a>. For details on Prometheus Receiver in OpenTelemetry Collector, refer to <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/test/e2e-v2/cases/postgresql/postgres-exporter/otel-collector-config.yaml">here</a>.</li>
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-<li>Config <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/test/e2e-v2/cases/postgresql/postgres-exporter/fluent-bit.conf">fluentbit</a></li>
-<li>Config PostgreSQL to enable slow log. <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/test/e2e-v2/cases/postgresql/postgres-exporter/postgresql.conf">Example</a>.</li>
+<li>Config <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/test/e2e-v2/cases/postgresql/postgres-exporter/fluent-bit.conf">fluentbit</a></li>
+<li>Config PostgreSQL to enable slow log. <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/test/e2e-v2/cases/postgresql/postgres-exporter/postgresql.conf">Example</a>.</li>
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 </span></code></pre></div><ol start="2">
 <li>Set up OpenTelemetry to scrape the metrics from OAP telemetry.</li>
 </ol>
-<p>Refer to <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/test/e2e-v2/cases/so11y/otel-collector-config.yaml">the E2E test case</a> as an example.</p>
+<p>Refer to <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/test/e2e-v2/cases/so11y/otel-collector-config.yaml">the E2E test case</a> as an example.</p>
 <p>For Kubernetes deployments, read the following section, otherwise you should be able to
 adjust the configurations below to fit your scenarios.</p>
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 <p><strong>For OpenTelemetry receiver:</strong></p>
 <ol>
 <li>Setup <a href="https://prometheus.io/docs/guides/node-exporter/">Prometheus node-exporter</a>.</li>
-<li>Setup <a href="https://opentelemetry.io/docs/collector/">OpenTelemetry Collector </a>. This is an example for OpenTelemetry Collector configuration <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/test/e2e-v2/cases/vm/prometheus-node-exporter/otel-collector-config.yaml">otel-collector-config.yaml</a>.</li>
+<li>Setup <a href="https://opentelemetry.io/docs/collector/">OpenTelemetry Collector </a>. This is an example for OpenTelemetry Collector configuration <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/test/e2e-v2/cases/vm/prometheus-node-exporter/otel-collector-config.yaml">otel-collector-config.yaml</a>.</li>
 <li>Config SkyWalking <a href="../opentelemetry-receiver">OpenTelemetry receiver</a>.</li>
 </ol>
 <p><strong>For Telegraf receiver:</strong></p>
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 <p>The OAP can load the configuration at bootstrap. If the new configuration is not well-formed, the OAP fails to start up. The files
 are located at <code>$CLASSPATH/zabbix-rules</code>.</p>
 <p>The file is written in YAML format, defined by the scheme described below. Square brackets indicate that a parameter is optional.</p>
-<p>An example for Zabbix agent configuration could be found <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/test/e2e-v2/cases/vm/zabbix/zabbix_agentd.conf">here</a>.
+<p>An example for Zabbix agent configuration could be found <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/test/e2e-v2/cases/vm/zabbix/zabbix_agentd.conf">here</a>.
 You can find details on Zabbix agent items from <a href="https://www.zabbix.com/documentation/current/manual/config/items/itemtypes/zabbix_agent">Zabbix Agent documentation</a>.</p>
 <h3 id="configuration-file-1">Configuration file</h3>
 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-yaml" data-lang="yaml"><span style="color:#998;font-style:italic"># initExp is the expression that initializes the current configuration file</span><span style="color:#bbb">
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 	<h1 id="dynamic-configuration-service-dcs">Dynamic Configuration Service, DCS</h1>
-<p><a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/oap-server/server-configuration/grpc-configuration-sync/src/main/proto/configuration-service.proto">Dynamic Configuration Service</a>
+<p><a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/oap-server/server-configuration/grpc-configuration-sync/src/main/proto/configuration-service.proto">Dynamic Configuration Service</a>
 is a gRPC service which requires implementation of the upstream system.
 The SkyWalking OAP fetches the configuration from the implementation (any system) after you open the implementation like this:</p>
 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-yaml" data-lang="yaml"><span style="color:#000080">configuration</span>:<span style="color:#bbb">
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 <p>The first step is to generate certificates and private key files for encrypting communication.</p>
 <h3 id="creating-ssltls-certificates">Creating SSL/TLS Certificates</h3>
 <p>The first step is to generate certificates and key files for encrypting communication. This is fairly straightforward: use <code>openssl</code> from the command line.</p>
-<p>Use this <a href="https://github.com/apache/skywalking/tree/a87794fb6b28c32ad73730f2b5d44a151fc9e3cd/tools/TLS/tls_key_generate.sh">script</a> if you are not familiar with how to generate key files.</p>
+<p>Use this <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/tools/TLS/tls_key_generate.sh">script</a> if you are not familiar with how to generate key files.</p>
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+</span></code></pre></div><p>You can still use this <a href="https://github.com/apache/skywalking/tree/962493d2443f85e6d3ee5638e7dd489f747f6dfa/tools/TLS/tls_key_generate.sh">script</a> to generate CA certificate and the key files of server-side(for OAP Server) and client-side(for Agent/Satellite).
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