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From "Keith Turner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ACCUMULO-3918) Different locality groups can compact with different iterator stacks
Date Fri, 26 Jun 2015 16:16:04 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-3918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14603131#comment-14603131
] 

Keith Turner commented on ACCUMULO-3918:
----------------------------------------

RE reusing the iterator stack vs config snapshot.   I had a hunch that using a config snapshot
would be quick to implement cleanly and that reusing iterator stacks would not.  However I
may be totally wrong about this.  I would not want to dissuade anyone from exploring into
reusing iterator stacks as a possible solution.

> Different locality groups can compact with different iterator stacks
> --------------------------------------------------------------------
>
>                 Key: ACCUMULO-3918
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3918
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: tserver
>    Affects Versions: 1.6.0
>            Reporter: John Vines
>
> While looking through the compactor code, I noticed that we load the iterator stack for
each locality group written and drop it when we're done. This means if a user reconfigures
iterators while a locality group is being written, the following locality groups will be compacted
inconsistently with the rest of the file.
> We should really read the stack once and be consistent for the entire file written.



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