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https://issues.apache.org/jira/browse/HBASE-4528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13128730#comment-13128730
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[email protected] commented on HBASE-4528:
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@Dhruba
Any figures to know the improvement in write performance?
- ramkrishna
On 2011-10-17 04:39:55, 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 2011-10-17 04:39:55)
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.
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 1184991
bq.
/src/main/java/org/apache/hadoop/hbase/regionserver/KeyValueSkipListSet.java
1184991
bq. /src/main/java/org/apache/hadoop/hbase/regionserver/MemStore.java
1184991
bq.
/src/main/java/org/apache/hadoop/hbase/regionserver/ReadWriteConsistencyControl.java
1184991
bq. /src/main/java/org/apache/hadoop/hbase/regionserver/Store.java 1184991
bq. /src/main/java/org/apache/hadoop/hbase/regionserver/StoreFlusher.java
1184991
bq. /src/test/java/org/apache/hadoop/hbase/regionserver/TestParallelPut.java
PRE-CREATION
bq. /src/test/java/org/apache/hadoop/hbase/regionserver/TestStore.java
1184991
bq.
/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestLogRolling.java
1184991
bq.
bq. Diff: https://reviews.apache.org/r/2141/diff
bq.
bq.
bq. Testing
bq. -------
bq.
bq. I ran TestLogRolling over and over again, about 50 times, not failed a
single time.
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
> Fix For: 0.94.0
>
> Attachments: appendNoSync5.txt, appendNoSyncPut1.txt,
> appendNoSyncPut2.txt, appendNoSyncPut3.txt, appendNoSyncPut4.txt,
> appendNoSyncPut5.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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