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From "Devaraj Das (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12761) On region jump ClientScanners should get next row start key instead of a skip.
Date Mon, 29 Dec 2014 20:17:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14260402#comment-14260402
] 

Devaraj Das commented on HBASE-12761:
-------------------------------------

[~stack] I am on vacation presently.. Can't review the patch in detail until next week. But
I did skim the patch. If it can wait until then, fine... If not, commit it if all tests pass
and I'll have a look when I am back.

> 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
>         Attachments: HBASE-12761-v1.patch, HBASE-12761-v2.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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