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https://issues.apache.org/jira/browse/HBASE-11160?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack resolved HBASE-11160.
---------------------------
Resolution: Later
Resolving as 'later'. We lose some writethrough speed because we wait on
sequencedid. Would be good to fix but does not look easy. We can come back to
this later post WAL Interfaces redo for multi-WAL.
> Undo append waiting on region edit/sequence id update
> -----------------------------------------------------
>
> Key: HBASE-11160
> URL: https://issues.apache.org/jira/browse/HBASE-11160
> Project: HBase
> Issue Type: Sub-task
> Components: wal
> Affects Versions: 0.99.0
> Reporter: stack
> Assignee: stack
> Priority: Critical
> Fix For: 2.0.0, 0.99.1
>
>
> HBASE--11135 changed append to wait on the update of the edit/sequence id.
> This slows writes by a significant amount (50% slower?). [~jeffreyz] is
> going to look at updating MVCC inside in the ring buffer consumer thread just
> after the region edit/sequence id update. If that works, then we can undo
> having append wait on the sequence id update and get some of our speedup
> back. Marking this 0.99 and blocker so we don't forget about it (Undoing the
> wait is just a case of removing the few lines of latch code in FSWALEdit).
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