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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Deleted] (HBASE-16890) Analyze the performance of AsyncWAL and fix the same
Date Fri, 28 Oct 2016 05:49:58 GMT

     [ https://issues.apache.org/jira/browse/HBASE-16890?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

ramkrishna.s.vasudevan updated HBASE-16890:
-------------------------------------------
    Comment: was deleted

(was: for this test I did not apply any other patch other than the above patch. Those things
are actually not the real killers. But for our offheap thing to work yes we surely need to
do some change in the AsyncWALProtbufWriter#append  part. And I don't have the lib with me
so things are working by creating temp buffers only. If we do all those we can reduce some
more garbage.)

> 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, 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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