[ https://issues.apache.org/jira/browse/HBASE-16890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16285168#comment-16285168 ]
Chance Li commented on HBASE-16890: ----------------------------------- Hi Stack, do 24 thread(or 48 threads) mean "threadcount=24" on one YCSB client? hbase.wal.async.use-shared-event-loop is useful on my test env, It's difference with your and ZhangDuo's test result. maybe not only because PCI-e. and because of CPU-BOUND, with multiwal the asyncwal is more better than FSHLog now on my test env. > Analyze the performance of AsyncWAL and fix the same > ---------------------------------------------------- > > Key: HBASE-16890 > URL: https://issues.apache.org/jira/browse/HBASE-16890 > Project: HBase > Issue Type: Sub-task > Components: wal > Affects Versions: 2.0.0 > Reporter: ramkrishna.s.vasudevan > Assignee: ramkrishna.s.vasudevan > Priority: Blocker > Fix For: 2.0.0-beta-1 > > Attachments: AsyncWAL_disruptor.patch, AsyncWAL_disruptor_1 > (2).patch, AsyncWAL_disruptor_3.patch, AsyncWAL_disruptor_3.patch, > AsyncWAL_disruptor_4.patch, AsyncWAL_disruptor_6.patch, > HBASE-16890-rc-v2.patch, HBASE-16890-rc-v3.patch, > HBASE-16890-remove-contention-v1.patch, HBASE-16890-remove-contention.patch, > Screen Shot 2016-10-25 at 7.34.47 PM.png, Screen Shot 2016-10-25 at 7.39.07 > PM.png, Screen Shot 2016-10-25 at 7.39.48 PM.png, Screen Shot 2016-11-04 at > 5.21.27 PM.png, Screen Shot 2016-11-04 at 5.30.18 PM.png, async.svg, > classic.svg, contention.png, contention_defaultWAL.png, > ycsb_FSHlog.vs.Async.png > > > Tests reveal that AsyncWAL under load in single node cluster performs slower > than the Default WAL. This task is to analyze and see if we could fix it. > See some discussions in the tail of JIRA HBASE-15536. -- This message was sent by Atlassian JIRA (v6.4.14#64029)