[jira] [Updated] (HBASE-4528) The put operation can release the rowlock before sync-ing the Hlog

["dhruba borthakur (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-4528?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

dhruba borthakur updated HBASE-4528:
------------------------------------

    Attachment: appendNoSyncPut1.txt

The changes the multiPut operation so that the sync to the wal occurs outside the rowlock. 

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.

I have attached a unit test. I have not yet run all unit tests, but early feedback on this patch will be very helpful.

                
> 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
>
>
> 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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