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https://issues.apache.org/jira/browse/HBASE-5954?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14295425#comment-14295425
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stack commented on HBASE-5954:
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fsync every meta edit? I suppose that makes sense. Something we've always
wanted even.
Do we want to keep a syncCount and an fSyncCount?
It looks like
currentSequence = updateHighestSyncedSequence(currentSequence);
highestSyncedSequence is the absolute highest, the highest for sync and fsync,
which (I think) I follow.
The patch looks good. I can't see anything obviously wrong. Lets get it in. As
per [~busbey], need write up that this long-wanted facility is now available.
Would be cool to get numbers but that can be post-commit too.
> Allow proper fsync support for HBase
> ------------------------------------
>
> Key: HBASE-5954
> URL: https://issues.apache.org/jira/browse/HBASE-5954
> Project: HBase
> Issue Type: Improvement
> Components: HFile, wal
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Priority: Critical
> Fix For: 2.0.0
>
> Attachments: 5954-WIP-trunk.txt, 5954-WIP-v2-trunk.txt,
> 5954-trunk-hdfs-trunk-v2.txt, 5954-trunk-hdfs-trunk-v3.txt,
> 5954-trunk-hdfs-trunk-v4.txt, 5954-trunk-hdfs-trunk-v5.txt,
> 5954-trunk-hdfs-trunk-v6.txt, 5954-trunk-hdfs-trunk.txt, hbase-hdfs-744.txt
>
>
> At least get recommendation into 0.96 doc and some numbers running w/ this
> hdfs feature enabled.
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