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https://issues.apache.org/jira/browse/HBASE-10156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13971943#comment-13971943
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Nicolas Liochon commented on HBASE-10156:
-----------------------------------------
[[email protected]] A quick followup question, after I looked at the code
with [~devaraj]:
We sync .meta. in the initial phase 'appendNoSync' in trunk. This seems new:
0.98
{code}
if (doSync &&
(info.isMetaRegion() ||
!htd.isDeferredLogFlush())) {
{code}
trunk
{code}
if (doSync || info.isMetaRegion()) publishSyncThenBlockOnCompletion();
{code}
As well, if I read the code correctly, we're not taking into account the txId
when we sync? So if there is a stream of writes, we will wait for the sync of
the last writes, even if "our" edits are already in?
> FSHLog Refactor (WAS -> Fix up the HBASE-8755 slowdown when low contention)
> ---------------------------------------------------------------------------
>
> Key: HBASE-10156
> URL: https://issues.apache.org/jira/browse/HBASE-10156
> Project: HBase
> Issue Type: Sub-task
> Components: wal
> Reporter: stack
> Assignee: stack
> Fix For: 0.99.0
>
> Attachments: 10156.txt, 10156v10.txt, 10156v11.txt, 10156v12.txt,
> 10156v12.txt, 10156v13.txt, 10156v16.txt, 10156v17.txt, 10156v18.txt,
> 10156v19.txt, 10156v2.txt, 10156v20.txt, 10156v20.txt, 10156v21.txt,
> 10156v21.txt, 10156v21.txt, 10156v3.txt, 10156v4.txt, 10156v5.txt,
> 10156v6.txt, 10156v7.txt, 10156v9.txt, Disrupting.java
>
>
> HBASE-8755 slows our writes when only a few clients. Fix.
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