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https://issues.apache.org/jira/browse/HBASE-16890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16263871#comment-16263871
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ramkrishna.s.vasudevan commented on HBASE-16890:
------------------------------------------------
I tried this out (still on a single node cluster)
{code}
nohup ./hbase org.apache.hadoop.hbase.PerformanceEvaluation --nomapred
--presplit=50 --size=50 --columns=50 --valueSize=200 --writeToWAL=true
--bloomFilter=NONE randomWrite 50
{code}
AsyncWAL is faster in terms of throughput (completion time).
AsyncWAL
Avg: 1103134ms
FSHLog
Avg: 1280875ms
Though we have more cols the perf seems to be better for AsyncWAL. For now I
have only one node . I can try with multiple nodes next week or so. But
previously this one node test was showing FSHLog was faster and now that is not
the case is what I get. I have not digged in to the logs like I did previously
as currently doing something else. But I will do those next week or so.
> 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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