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Posted to common-issues@hadoop.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/08/27 20:15:00 UTC
[jira] [Work logged] (HADOOP-17222) Create socket address combined
with cache to speed up hdfs client choose DataNode
[ https://issues.apache.org/jira/browse/HADOOP-17222?focusedWorklogId=475525&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-475525 ]
ASF GitHub Bot logged work on HADOOP-17222:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 27/Aug/20 20:14
Start Date: 27/Aug/20 20:14
Worklog Time Spent: 10m
Work Description: hadoop-yetus commented on pull request #2241:
URL: https://github.com/apache/hadoop/pull/2241#issuecomment-682167781
:broken_heart: **-1 overall**
| Vote | Subsystem | Runtime | Comment |
|:----:|----------:|--------:|:--------|
| +0 :ok: | reexec | 0m 29s | Docker mode activated. |
||| _ Prechecks _ |
| +1 :green_heart: | dupname | 0m 0s | No case conflicting files found. |
| +1 :green_heart: | @author | 0m 0s | The patch does not contain any @author tags. |
| +1 :green_heart: | test4tests | 0m 0s | The patch appears to include 3 new or modified test files. |
||| _ trunk Compile Tests _ |
| +0 :ok: | mvndep | 3m 21s | Maven dependency ordering for branch |
| +1 :green_heart: | mvninstall | 28m 4s | trunk passed |
| +1 :green_heart: | compile | 19m 28s | trunk passed with JDK Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 |
| +1 :green_heart: | compile | 16m 47s | trunk passed with JDK Private Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 |
| +1 :green_heart: | checkstyle | 2m 48s | trunk passed |
| +1 :green_heart: | mvnsite | 4m 6s | trunk passed |
| +1 :green_heart: | shadedclient | 20m 34s | branch has no errors when building and testing our client artifacts. |
| +1 :green_heart: | javadoc | 2m 42s | trunk passed with JDK Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 |
| +1 :green_heart: | javadoc | 4m 6s | trunk passed with JDK Private Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 |
| +0 :ok: | spotbugs | 3m 13s | Used deprecated FindBugs config; considering switching to SpotBugs. |
| +1 :green_heart: | findbugs | 10m 10s | trunk passed |
||| _ Patch Compile Tests _ |
| +0 :ok: | mvndep | 0m 29s | Maven dependency ordering for patch |
| +1 :green_heart: | mvninstall | 3m 36s | the patch passed |
| +1 :green_heart: | compile | 25m 7s | the patch passed with JDK Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 |
| +1 :green_heart: | javac | 25m 7s | the patch passed |
| +1 :green_heart: | compile | 23m 1s | the patch passed with JDK Private Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 |
| +1 :green_heart: | javac | 23m 1s | the patch passed |
| +1 :green_heart: | checkstyle | 3m 23s | root: The patch generated 0 new + 136 unchanged - 2 fixed = 136 total (was 138) |
| +1 :green_heart: | mvnsite | 4m 32s | the patch passed |
| +1 :green_heart: | whitespace | 0m 0s | The patch has no whitespace issues. |
| +1 :green_heart: | xml | 0m 2s | The patch has no ill-formed XML file. |
| +1 :green_heart: | shadedclient | 18m 15s | patch has no errors when building and testing our client artifacts. |
| +1 :green_heart: | javadoc | 2m 37s | the patch passed with JDK Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 |
| +1 :green_heart: | javadoc | 4m 27s | the patch passed with JDK Private Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 |
| +1 :green_heart: | findbugs | 10m 47s | the patch passed |
||| _ Other Tests _ |
| +1 :green_heart: | unit | 10m 30s | hadoop-common in the patch passed. |
| +1 :green_heart: | unit | 2m 41s | hadoop-hdfs-client in the patch passed. |
| -1 :x: | unit | 121m 36s | hadoop-hdfs in the patch passed. |
| +1 :green_heart: | asflicense | 1m 7s | The patch does not generate ASF License warnings. |
| | | 343m 16s | |
| Reason | Tests |
|-------:|:------|
| Failed junit tests | hadoop.hdfs.TestErasureCodingPoliciesWithRandomECPolicy |
| | hadoop.hdfs.TestDFSClientSocketSize |
| | hadoop.hdfs.TestFileChecksumCompositeCrc |
| | hadoop.hdfs.TestDecommissionWithBackoffMonitor |
| | hadoop.hdfs.server.namenode.TestNameNodeRetryCacheMetrics |
| | hadoop.hdfs.server.namenode.ha.TestStandbyCheckpoints |
| | hadoop.hdfs.TestReadStripedFileWithDNFailure |
| | hadoop.hdfs.server.blockmanagement.TestBlockTokenWithDFSStriped |
| | hadoop.hdfs.TestReconstructStripedFileWithRandomECPolicy |
| | hadoop.fs.contract.hdfs.TestHDFSContractMultipartUploader |
| | hadoop.hdfs.TestDFSStripedOutputStreamWithRandomECPolicy |
| | hadoop.hdfs.TestAppendSnapshotTruncate |
| | hadoop.hdfs.server.sps.TestExternalStoragePolicySatisfier |
| | hadoop.hdfs.TestReadStripedFileWithMissingBlocks |
| | hadoop.hdfs.TestFileChecksum |
| | hadoop.hdfs.TestAbandonBlock |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.40 ServerAPI=1.40 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2241/10/artifact/out/Dockerfile |
| GITHUB PR | https://github.com/apache/hadoop/pull/2241 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient findbugs checkstyle xml |
| uname | Linux 08b2a55dd876 4.15.0-58-generic #64-Ubuntu SMP Tue Aug 6 11:12:41 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / d1c60a53f60 |
| Default Java | Private Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 |
| Multi-JDK versions | /usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 |
| unit | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2241/10/artifact/out/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt |
| Test Results | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2241/10/testReport/ |
| Max. process+thread count | 4298 (vs. ulimit of 5500) |
| modules | C: hadoop-common-project/hadoop-common hadoop-hdfs-project/hadoop-hdfs-client hadoop-hdfs-project/hadoop-hdfs U: . |
| Console output | https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2241/10/console |
| versions | git=2.17.1 maven=3.6.0 findbugs=4.0.6 |
| Powered by | Apache Yetus 0.13.0-SNAPSHOT https://yetus.apache.org |
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Issue Time Tracking
-------------------
Worklog Id: (was: 475525)
Remaining Estimate: 0h
Time Spent: 10m
> Create socket address combined with cache to speed up hdfs client choose DataNode
> ---------------------------------------------------------------------------------
>
> Key: HADOOP-17222
> URL: https://issues.apache.org/jira/browse/HADOOP-17222
> Project: Hadoop Common
> Issue Type: Improvement
> Components: common, hdfs-client
> Environment: HBase version: 2.1.0
> JVM: -Xmx2g -Xms2g
> hadoop hdfs version: 2.7.4
> disk:SSD
> OS:CentOS Linux release 7.4.1708 (Core)
> JMH Benchmark: @Fork(value = 1)
> @Warmup(iterations = 300)
> @Measurement(iterations = 300)
> Reporter: fanrui
> Assignee: fanrui
> Priority: Major
> Attachments: After Optimization remark.png, After optimization.svg, Before Optimization remark.png, Before optimization.svg
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Note：Not only the hdfs client can get the current benefit, all callers of NetUtils.createSocketAddr will get the benefit. Just use hdfs client as an example.
>
> Hdfs client selects best DN for hdfs Block. method call stack:
> DFSInputStream.chooseDataNode -> getBestNodeDNAddrPair -> NetUtils.createSocketAddr
> NetUtils.createSocketAddr creates the corresponding InetSocketAddress based on the host and port. There are some heavier operations in the NetUtils.createSocketAddr method, for example: URI.create(target), so NetUtils.createSocketAddr takes more time to execute.
> The following is my performance report. The report is based on HBase calling hdfs. HBase is a high-frequency access client for hdfs, because HBase read operations often access a small DataBlock (about 64k) instead of the entire HFile. In the case of high frequency access, the NetUtils.createSocketAddr method is time-consuming.
> h3. Test Environment：
>
> {code:java}
> HBase version: 2.1.0
> JVM: -Xmx2g -Xms2g
> hadoop hdfs version: 2.7.4
> disk:SSD
> OS:CentOS Linux release 7.4.1708 (Core)
> JMH Benchmark: @Fork(value = 1)
> @Warmup(iterations = 300)
> @Measurement(iterations = 300)
> {code}
> h4. Before Optimization FlameGraph:
> In the figure, we can see that DFSInputStream.getBestNodeDNAddrPair accounts for 4.86% of the entire CPU, and the creation of URIs accounts for a larger proportion.
> !Before Optimization remark.png!
> h3. Optimization ideas:
> NetUtils.createSocketAddr creates InetSocketAddress based on host and port. Here we can add Cache to InetSocketAddress. The key of Cache is host and port, and the value is InetSocketAddress.
> h4. After Optimization FlameGraph:
> In the figure, we can see that DFSInputStream.getBestNodeDNAddrPair accounts for 0.54% of the entire CPU. Here, ConcurrentHashMap is used as the Cache, and the ConcurrentHashMap.get() method gets data from the Cache. The CPU usage of DFSInputStream.getBestNodeDNAddrPair has been optimized from 4.86% to 0.54%.
> !After Optimization remark.png!
> h3. Original FlameGraph link:
> [Before Optimization|https://drive.google.com/file/d/133L5m75u2tu_KgKfGHZLEUzGR0XAfUl6/view?usp=sharing]
> [After Optimization FlameGraph|https://drive.google.com/file/d/133L5m75u2tu_KgKfGHZLEUzGR0XAfUl6/view?usp=sharing]
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