[
https://issues.apache.org/jira/browse/HBASE-16890?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16263942#comment-16263942
]
Chance Li commented on HBASE-16890:
-----------------------------------
[~ramkrishna]
bq. One quesiton on the YCSB - so since you measure write performance - the
batching of mutations is disabled? I think only then we can measure the correct
latency right?
1. hbase-client version is 1.x on the YCSB. This is to compare hbase-server 1.x
with 2.0 using the same client.
2. ycsb's clientbuffering is false
3. autoflush is true also.
4. mullti datanode, one RS.
[~Apache9]
bq. The ops metrics are 81435 vs. 77108, FSHLog is 5% more but the run time is
almost the same? The unit is milliseconds, so for a 10 mins run the diff is
only 4ms while there is 5% ops differ?
yes. I tested it more times and got almost the same result. Can be trusted.
I'll try to figure out why it's different from ram's test result.
> 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.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
