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From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-17045) Unify the implementation of small scan and regular scan
Date Tue, 08 Nov 2016 02:25:58 GMT
Duo Zhang created HBASE-17045:
---------------------------------

             Summary: Unify the implementation of small scan and regular scan
                 Key: HBASE-17045
                 URL: https://issues.apache.org/jira/browse/HBASE-17045
             Project: HBase
          Issue Type: Sub-task
          Components: Client, scan
    Affects Versions: 2.0.0, 1.4.0
            Reporter: Duo Zhang


See [~enis]'s comment in HBASE-16838

https://issues.apache.org/jira/browse/HBASE-16838?focusedCommentId=15637803&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15637803

But there is another scenario that we need small scan is that, we do not know the stop row
but we only want a small set of results. For example, in the implementation of region locator,
we will use small scan and set caching to 1 as we only need one row.

So I think we need to add a new option(maybe called limit?) for the scan object, and deprecate
the small option. And the server side modification should also be committed to branch-1 to
simplify the logic of async client in 2.0.



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