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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-12761) On region jump ClientScanners should get next row start key instead of a skip.
Date Tue, 30 Dec 2014 22:52:14 GMT

     [ https://issues.apache.org/jira/browse/HBASE-12761?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-12761:
--------------------------
       Resolution: Fixed
    Fix Version/s: 1.1.0
                   2.0.0
     Hadoop Flags: Reviewed
           Status: Resolved  (was: Patch Available)

I pushed this. Its very nice cleanup.  Would be good to get the replicas perspective POV from
[~enis] and [~devaraj] when have a chance.  Thanks [~jurmous]

> On region jump ClientScanners should get next row start key instead of a skip.
> ------------------------------------------------------------------------------
>
>                 Key: HBASE-12761
>                 URL: https://issues.apache.org/jira/browse/HBASE-12761
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Jurriaan Mous
>            Assignee: Jurriaan Mous
>             Fix For: 2.0.0, 1.1.0
>
>         Attachments: HBASE-12761-v1.patch, HBASE-12761-v2.patch, HBASE-12761.patch
>
>
> While working on async scanner I had some trouble with the extra RPC calls that happen
to let the Scanner advance 1 row so it skips the last already known row. 
> This RPC call can be avoided by letting the start key be the last row with an appended
0. This saves quite some logic from the scanners and improves performance by saving extra
RPC calls.



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