You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hbase.apache.org by "Hudson (Jira)" <ji...@apache.org> on 2021/11/22 15:46:00 UTC
[jira] [Commented] (HBASE-26305) Move NavigableSet add operation to writer thread in BucketCache
[ https://issues.apache.org/jira/browse/HBASE-26305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17447495#comment-17447495 ]
Hudson commented on HBASE-26305:
--------------------------------
Results for branch branch-1
[build #183 on builds.a.o|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/branch-1/183/]: (/) *{color:green}+1 overall{color}*
----
details (if available):
(/) {color:green}+1 general checks{color}
-- For more information [see general report|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/branch-1/183//General_Nightly_Build_Report/]
(/) {color:green}+1 jdk7 checks{color}
-- For more information [see jdk7 report|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/branch-1/183//JDK7_Nightly_Build_Report/]
(/) {color:green}+1 jdk8 hadoop2 checks{color}
-- For more information [see jdk8 (hadoop2) report|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/branch-1/183//JDK8_Nightly_Build_Report_(Hadoop2)/]
(/) {color:green}+1 source release artifact{color}
-- See build output for details.
> Move NavigableSet add operation to writer thread in BucketCache
> ---------------------------------------------------------------
>
> Key: HBASE-26305
> URL: https://issues.apache.org/jira/browse/HBASE-26305
> Project: HBase
> Issue Type: Improvement
> Components: BucketCache, Performance
> Reporter: Yutong Xiao
> Assignee: Yutong Xiao
> Priority: Minor
> Fix For: 2.5.0, 3.0.0-alpha-2
>
> Attachments: logn in WriterThreads.png, logn in cacheBlock.png
>
>
> We currently use a ConcurrentSkipList to store blocks by HFile in bucket cache. The average time complexity of the add function is O(logn). We can move this time costly to the writer threads to reduce the response latency of read requests. I have tested the time cost of function cacheBlock in BucketCache and attached the metrics screenshots.
--
This message was sent by Atlassian Jira
(v8.20.1#820001)