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https://issues.apache.org/jira/browse/HBASE-2467?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jean-Daniel Cryans updated HBASE-2467:
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Attachment: HBASE-2467-v3.patch
Rebased patch after HBASE-2922, also I changed the synchronization bit that
Stack referred to and added the missing bits for deferred log flushing to be
fully working. I did some loading tests, with deferred log flush it's 80-100%
faster than without it, but still using HDFS-895 along with the rest of this
patch (which is a good bit faster already). To sum up:
- With this patch and HDFS-895, it's 25-30% faster.
- With this patch and deferred log flush on, it's another 80-100% faster, but
less durable (obviously).
> 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
> Fix For: 0.90.0
>
> Attachments: HBASE-2467-v2.patch, HBASE-2467-v3.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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