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From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16890) Analyze the performance of AsyncWAL and fix the same
Date Fri, 04 Nov 2016 09:32:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15635789#comment-15635789
] 

Duo Zhang commented on HBASE-16890:
-----------------------------------

Another round, the old AsyncFSWAL is still the slowest. The other three are almost same.

{noformat}
./bin/hbase org.apache.hadoop.hbase.PerformanceEvaluation --nomapred --presplit=50 --size=10
--columns=50 --valueSize=200 --writeToWAL=true --bloomFilter=NONE randomWrite 50

FSHLog Min: 75930ms Max: 88080ms Avg: 84743ms
AsyncFSWAL: Min: 89337ms Max: 103743ms Avg: 100205ms
AsyncFSWAL-duo: Min: 72335ms Max: 86026ms Avg: 81308ms
AsyncFSWAL-ram: Min: 74423ms Max: 85647msAvg: 82212ms
{noformat}

What's your new result [~ram_krish]?

And boss [~stack], could you please try the new patches to see they work for you? Both ram's
and mine. Thanks.

> 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
>             Fix For: 2.0.0
>
>         Attachments: AsyncWAL_disruptor.patch, AsyncWAL_disruptor_1 (2).patch, AsyncWAL_disruptor_3.patch,
AsyncWAL_disruptor_3.patch, AsyncWAL_disruptor_4.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, async.svg, classic.svg, contention.png, contention_defaultWAL.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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