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https://issues.apache.org/jira/browse/HBASE-2467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12931176#action_12931176
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Nicolas Spiegelberg commented on HBASE-2467:
--------------------------------------------
How much operational experience have you had with production machines running
HDFS-895 + HBASE-2467? I did a code review of HDFS-895 and feel like it's
pretty solid. We have it applied to our internal branch, but we don't have
HBASE=2467 applied. Although I think the HDFS-895 code is good, there's no
question that it's very intricate and needs plenty of test time with large
traffic before we should rely on it. I hear some of you guys have been running
it on production traffic for months, is that correct? If so, I think that's
sufficient test time and we can commit this.
> Concurrent flushers in HLog sync using HDFS-895
> -----------------------------------------------
>
> Key: HBASE-2467
> URL: https://issues.apache.org/jira/browse/HBASE-2467
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Blocker
> Fix For: 0.90.0
>
> Attachments: HBASE-2467-v2.patch, HBASE-2467-v3.patch,
> HBASE-2467-v4.patch, hbase-2467.txt
>
>
> HDFS-895 changes hflush() to be able to run concurrently from multiple
> threads, where flushes can be concurrent with further writes to the same file.
> We need to rip out/amend the group commit code a bit to take advantage of
> this.
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