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dhruba borthakur updated HBASE-4528: ------------------------------------ Attachment: appendNoSyncPut2.txt Incorporated most of Ted's comments and all of Lar's comments. I did not change the order of advancing the rwcc first before releasing the rowlock in the finally-clause because this will occur only in some error case, and in that case it might be better to do things in the normal order. Technically, either way should be fine, but if I am missing something please let me know and I can change it too. In TestParallelPut, I did not fold the two loops of thread-creation and thread-start. The reason being that I would like more concurrency among the threads, and if I create and start in the same loop then it is likely that by the a thread starts running, the earlier ones would probably be finished or advanced significantly, thus reducing the time when all threads are running concurrently. > 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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira