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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 Thu, 12 Nov 2015 13:34:10 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-3948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15002063#comment-15002063
] 

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

Github user dlmarion commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/51#discussion_r44656596
  
    --- Diff: core/src/main/java/org/apache/accumulo/core/client/mapred/AbstractInputFormat.java
---
    @@ -484,7 +509,7 @@ public void initialize(InputSplit inSplit, JobConf job) throws IOException
{
           if (null == authorizations) {
             authorizations = getScanAuthorizations(job);
           }
    -
    +      String classLoaderContext = getContext(job);
    --- End diff --
    
    None of the other variables in the method have the final modifier. Are you trying to raise
the bar?


> 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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