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https://issues.apache.org/jira/browse/HBASE-2353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12875525#action_12875525
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Todd Lipcon commented on HBASE-2353:
------------------------------------
I'm going to take a stab at the optimistic mini-batching technique suggested
above.
Andrew: did you get any final numbers with your EC2 testing of my HDFS-side
sync parallelization? In my tests here I saw similar performance on trunk vs 20
when my patches were included, but haven't done a real rigorous comparison.
> HBASE-2283 removed bulk sync optimization for multi-row puts
> ------------------------------------------------------------
>
> Key: HBASE-2353
> URL: https://issues.apache.org/jira/browse/HBASE-2353
> Project: HBase
> Issue Type: Bug
> Reporter: ryan rawson
> Assignee: Todd Lipcon
> Priority: Blocker
> Fix For: 0.21.0
>
> Attachments: HBASE-2353_def_log_flush.patch
>
>
> previously to HBASE-2283 we used to call flush/sync once per put(Put[]) call
> (ie: batch of commits). Now we do for every row.
> This makes bulk uploads slower if you are using WAL. Is there an acceptable
> solution to achieve both safety and performance by bulk-sync'ing puts? Or
> would this not work in face of atomic guarantees?
> discuss!
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