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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 Wed, 11 Nov 2015 18:14:10 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-3948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15000824#comment-15000824
] 

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

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

    https://github.com/apache/accumulo/pull/51#discussion_r44565049
  
    --- Diff: server/tserver/src/main/java/org/apache/accumulo/tserver/tablet/ScanOptions.java
---
    @@ -99,4 +101,12 @@ public SamplerConfigurationImpl getSamplerConfigurationImpl() {
       public long getBatchTimeOut() {
         return batchTimeOut;
       }
    +
    +  public String getContext() {
    +    return context;
    +  }
    +
    +  public void setContext(String context) {
    --- End diff --
    
    Is this actually used anywhere? Can we just make context final?


> 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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