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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16890) Analyze the performance of AsyncWAL and fix the same
Date Mon, 11 Dec 2017 20:12:02 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16286480#comment-16286480
] 

stack commented on HBASE-16890:
-------------------------------

128 threads. Did two runs of first and last just to be sure of what I was seeing.

||workload||oldFSHLog||oldFSHLog||async||async+own_eventloop||async+own_eventloop||
|load|15063 ops/s|14536 ops/s|18014 ops/s|17542 ops/s|15943 ops/s|
|a|34080 ops/s|34610 ops/s|53664 ops/s|51549 ops/s|49365 ops/s|
|w|26032 ops/s|25999 ops/s|53122 ops/s|53207 ops/s|52435 ops/s|

So, +1 on making async+own_eventloop default WAL client. It shows better in these yscb tests
and we can improve it further.

Let me check the issue w/ 2.8.

> 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.



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