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From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17049) Find out why AsyncFSWAL issues much more syncs than FSHLog
Date Mon, 14 Nov 2016 05:06:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15662787#comment-15662787
] 

Duo Zhang commented on HBASE-17049:
-----------------------------------

With HBASE-17085 we can perform a little better in the PE.

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

FSHLog: Min: 494940ms   Max: 527185ms   Avg: 520070ms
AsyncFSWAL-old: Min: 899553ms   Max: 937701ms   Avg: 931112ms
AsyncFSWAL-new:Min: 745193ms   Max: 770322ms   Avg: 764724ms
{noformat}

Still slower than FSHLog. Need to find out more.

Thanks.

> Find out why AsyncFSWAL issues much more syncs than FSHLog
> ----------------------------------------------------------
>
>                 Key: HBASE-17049
>                 URL: https://issues.apache.org/jira/browse/HBASE-17049
>             Project: HBase
>          Issue Type: Sub-task
>          Components: wal
>    Affects Versions: 2.0.0
>            Reporter: Duo Zhang
>             Fix For: 2.0.0
>
>
> https://issues.apache.org/jira/browse/HBASE-16890?focusedCommentId=15647590&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15647590



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