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https://issues.apache.org/jira/browse/HBASE-10344?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13872387#comment-13872387
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Ted Yu commented on HBASE-10344:
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[~apurtell]:
Do you want this in 0.98 ?
> Improve write performance by ignoring sync to hdfs when an asyncer's writes
> have been synced by other asyncer
> -------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-10344
> URL: https://issues.apache.org/jira/browse/HBASE-10344
> Project: HBase
> Issue Type: Improvement
> Reporter: Feng Honghua
> Assignee: Feng Honghua
> Attachments: HBASE-10344-trunk_v0.patch
>
>
> By fixing [HBASE-10329|https://issues.apache.org/jira/browse/HBASE-10329], we
> know it's possible an asyncer's writes could have been synced by other
> asyncer before it starts to do the sync. We distinguish this case and handle
> accordingly when writer is null, but only for when writer is null.
> When writer is not null(the much more typical case), we also can check and
> ignore the sync if asyncer's writes have been synced by other asyncer before
> doing sync. Since sync is a quite heavy operation(together with the following
> notifying notifier thread and log roll check) we can have some performance
> gain by ignoring it for such case.
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