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https://issues.apache.org/jira/browse/HBASE-6116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13404359#comment-13404359
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Lars Hofhansl commented on HBASE-6116:
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I am having a hard time quantifying any advantage from this patch with my tests
in our DEV cluster.
So I no longer think that this is a worthwhile avenue to follow.
I used PerformanceEvaluation. I hacked it to be able to test with smaller
packets and/or autoflush enabled, and in no scenario did I see a statistically
significant advantage when this patch was enabled.
Will close as "Won't fix" unless somebody else can think of other ways of
testing this.
@Ted: Maybe you can do the test you test you for multiple WALs?
> Allow parallel HDFS writes for HLogs.
> -------------------------------------
>
> Key: HBASE-6116
> URL: https://issues.apache.org/jira/browse/HBASE-6116
> Project: HBase
> Issue Type: Bug
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Attachments: 6116-v1.txt, apurtell-patches.zip,
> pipelined-vs-parallel-comparison.zip
>
>
> In HDFS-1783 I adapted Dhrubas changes to be used in Hadoop trunk.
> This issue will include the necessary reflection changes to optionally enable
> this for the WALs in HBase.
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