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https://issues.apache.org/jira/browse/HBASE-16890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15635907#comment-15635907
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ramkrishna.s.vasudevan commented on HBASE-16890:
------------------------------------------------
My recent test results
WALPE command
{code}
./hbase org.apache.hadoop.hbase.wal.WALPerformanceEvaluation -threads 100
-iterations 25000 -qualifiers 25 -keySize 50 -valueSize 200
{code}
PE command
{code}
./hbase org.apache.hadoop.hbase.PerformanceEvaluation --nomapred --presplit=50
--size=10 --columns=50 --valueSize=200 --writeToWAL=true --bloomFilter=NONE
randomWrite 50
{code}
OldAsyncFSWAL
{code}
WALPE : 23341 ops/sec
PE : Min: 170770ms Max: 182114ms Avg: 180348ms
{code}
Duo's patch
{code}
WALPE : 27244.393ops/s
PE : Min: 142367ms Max: 161602ms Avg: 158968ms
{code}
Ram's patch
{code}
WALPE : 26334 ops/sec
PE : Min: 146147ms Max: 154044ms Avg: 152314ms
{code}
FSHLog
{code}
WALPE : 26031 ops/sec
PE : Min: 92627ms Max: 101547ms Avg: 99960ms
{code}
So FSHLog still remains the fastest and oldAsyncWAL being the slowest. All
these tests have the hbase-site configs that Duo has commented above.
> 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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