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https://issues.apache.org/jira/browse/HBASE-4528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13119259#comment-13119259
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[email protected] commented on HBASE-4528:
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https://reviews.apache.org/r/2141/#review2260
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Ship it!
One minor comment.
/src/test/java/org/apache/hadoop/hbase/regionserver/TestParallelPut.java
<https://reviews.apache.org/r/2141/#comment5238>
To achieve greater level of parallelism, you can fold this loop into the
loop above and introduce a CountDownLatch so that the Putter's start at the
same time.
See:
http://programmingexamples.wikidot.com/countdownlatch
- Ted
On 2011-10-03 05:54:07, Dhruba Borthakur wrote:
bq.
bq. -----------------------------------------------------------
bq. This is an automatically generated e-mail. To reply, visit:
bq. https://reviews.apache.org/r/2141/
bq. -----------------------------------------------------------
bq.
bq. (Updated 2011-10-03 05:54:07)
bq.
bq.
bq. Review request for hbase.
bq.
bq.
bq. Summary
bq. -------
bq.
bq. The changes the multiPut operation so that the sync to the wal occurs
outside the rowlock.
bq.
bq. This enhancement is done only to HRegion.mut(Put[]) because this is the
only method that gets invoked from an application. The HRegion.put(Put) is used
only by unit tests and should possibly be deprecated.
bq.
bq. I have attached a unit test. I have not yet run all unit tests, but early
feedback on this patch will be very helpful.
bq.
bq.
bq. This addresses bug HBASE-4528.
bq. https://issues.apache.org/jira/browse/HBASE-4528
bq.
bq.
bq. Diffs
bq. -----
bq.
bq. /src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java 1178298
bq. /src/test/java/org/apache/hadoop/hbase/regionserver/TestParallelPut.java
PRE-CREATION
bq.
bq. Diff: https://reviews.apache.org/r/2141/diff
bq.
bq.
bq. Testing
bq. -------
bq.
bq. Not yet run the full suite of unit tests.
bq.
bq.
bq. Thanks,
bq.
bq. Dhruba
bq.
bq.
> The put operation can release the rowlock before sync-ing the Hlog
> ------------------------------------------------------------------
>
> Key: HBASE-4528
> URL: https://issues.apache.org/jira/browse/HBASE-4528
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Reporter: dhruba borthakur
> Assignee: dhruba borthakur
> Attachments: appendNoSyncPut1.txt, appendNoSyncPut2.txt
>
>
> This allows for better throughput when there are hot rows. A single row
> update improves from 100 puts/sec/server to 5000 puts/sec/server.
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