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From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17045) Unify the implementation of small scan and regular scan
Date Fri, 20 Jan 2017 08:33:26 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15831381#comment-15831381
] 

Duo Zhang commented on HBASE-17045:
-----------------------------------

Sorry a bit late...

 [~stack] You can take a look at HBASE-17489 tomorrow morning sir...

Thanks.

> 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
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>             Fix For: 2.0.0
>
>         Attachments: HBASE-17045.patch, HBASE-17045-v1.patch, HBASE-17045-v2.patch, HBASE-17045-v3.patch,
HBASE-17045-v4.patch, HBASE-17045-v5.patch
>
>
> 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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