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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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