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https://issues.apache.org/jira/browse/HBASE-10344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Feng Honghua updated HBASE-10344:
---------------------------------
Attachment: HBASE-10344-trunk_v0.patch
patch attached. thanks [[email protected]] for reminding to create this new
jira since [HBASE-10329|https://issues.apache.org/jira/browse/HBASE-10329] is
resolved.
> Improve writer 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 have been synced by other asyncer
> before it starts to do the sync. We distinguish this case and handle
> accordingly when the writer is null.
> But when writer is not null(most of the time), 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 following notifying
> notifier thread and log roll check) we can have some performance gain by
> ignoring it for such case.
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