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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-3948) Enable A/B testing of scan iterators on a table
Date Tue, 10 Nov 2015 20:55:10 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-3948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14999338#comment-14999338
] 

ASF GitHub Bot commented on ACCUMULO-3948:
------------------------------------------

GitHub user dlmarion opened a pull request:

    https://github.com/apache/accumulo/pull/51

    ACCUMULO-3948: Add Scanner classloader context

    

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/dlmarion/accumulo ACCUMULO-3948

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/accumulo/pull/51.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #51
    
----
commit 11ab556858b1360f0f100184cd9391e55ccfa03a
Author: Dave Marion <dlmarion@apache.org>
Date:   2015-11-10T20:52:20Z

    ACCUMULO-3948: Add Scanner classloader context

----


> Enable A/B testing of scan iterators on a table
> -----------------------------------------------
>
>                 Key: ACCUMULO-3948
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3948
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: tserver
>            Reporter: Dave Marion
>            Assignee: Dave Marion
>             Fix For: 1.8.0
>
>         Attachments: ACCUMULO-3948.1-6-3.patch, TestIterator.patch
>
>
> Classpath contexts are assigned to a table via the table configuration. You can test
at scale by cloning your table and assigning a new classpath context to the cloned table.
However, you would also need to change your application to use the new table names and since
we cannot disable compactions you would start to consume more space in the filesystem for
that table. We can support users passing in a context name to use for the scan on existing
tables. 



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