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From "Guanghao Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17049) Do not issue sync request when there are still entries in ringbuffer
Date Mon, 27 Nov 2017 08:54:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16266526#comment-16266526
] 

Guanghao Zhang commented on HBASE-17049:
----------------------------------------

Build from our latest branch-2. And run the PE with a hbase cluster only has 1 RS and 5 DN
for HDFS.

{code}
./hbase org.apache.hadoop.hbase.PerformanceEvaluation --nomapred --presplit=50 --size=50 --columns=50
--valueSize=200 --writeToWAL=true --bloomFilter=NONE randomWrite 24
FSHLog: Min: 1089878ms	Max: 1103333ms	Avg: 1099398ms
AsyncFSWAL: Min: 986609ms	Max: 999545ms	Avg: 995087ms
AsyncFSWAL(with HBASE-17049.patch): Min: 901895ms	Max: 921128ms	Avg: 916126ms
{code}

When set autoFlush=True, try the PE again.
{code}
./hbase org.apache.hadoop.hbase.PerformanceEvaluation --nomapred --autoFlush=True --presplit=50
--size=50 --columns=50 --valueSize=200 --writeToWAL=true --bloomFilter=NONE randomWrite 24
FSHLog: Min: 1378235ms	Max: 1380474ms	Avg: 1379726ms
AsyncFSWAL: Min: 1014730ms	Max: 1017788ms	Avg: 1016836ms
AsyncFSWAL(with HBASE-17049.patch): Min: 1114054ms	Max: 1117174ms	Avg: 1116051ms
{code}

> Do not issue sync request when there are still entries in ringbuffer
> --------------------------------------------------------------------
>
>                 Key: HBASE-17049
>                 URL: https://issues.apache.org/jira/browse/HBASE-17049
>             Project: HBase
>          Issue Type: Sub-task
>          Components: wal
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>            Priority: Critical
>             Fix For: 2.0.0-beta-1
>
>         Attachments: HBASE-17049.patch, delay-sync.patch
>
>
> 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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