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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TEPHRA-230) Improve the logic used to find recorded regions during invalid list pruning
Date Wed, 17 May 2017 00:55:04 GMT

    [ https://issues.apache.org/jira/browse/TEPHRA-230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16013324#comment-16013324
] 

ASF GitHub Bot commented on TEPHRA-230:
---------------------------------------

GitHub user poornachandra opened a pull request:

    https://github.com/apache/incubator-tephra/pull/43

    TEPHRA-230 Fix reading of saved regions during invalid pruning run

    JIRA - https://issues.apache.org/jira/browse/TEPHRA-230

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

    $ git pull https://github.com/poornachandra/incubator-tephra feature/fix-invalid-prune

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

    https://github.com/apache/incubator-tephra/pull/43.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 #43
    
----
commit 667144a99cd3863bf68982fb745d15786f294a92
Author: poorna <poorna@cask.co>
Date:   2017-05-17T00:47:15Z

    Port to other compat modules

commit daf57aa167c0c6c240ba04642d0c328211cb1b20
Author: poorna <poorna@cask.co>
Date:   2017-05-17T00:51:32Z

    TEPHRA-230 Fix reading of saved regions during invalid pruning run

----


> Improve the logic used to find recorded regions during invalid list pruning
> ---------------------------------------------------------------------------
>
>                 Key: TEPHRA-230
>                 URL: https://issues.apache.org/jira/browse/TEPHRA-230
>             Project: Tephra
>          Issue Type: Bug
>    Affects Versions: 0.10.0-incubating
>            Reporter: Poorna Chandra
>            Assignee: Poorna Chandra
>             Fix For: 0.11.0-incubating
>
>
> During an invalid list pruning run, the plugin records the regions present on the HBase
cluster at that time. It also records the count of regions as a checksum. 
> While reading the list of recorded regions, if the checksum does not match the number
of regions read at time {{t}}, then the plugin will move on to regions at time {{t - 1}}.
However, the {{t-1}} computation in inefficient today, and leads to microsecond decrements.
It can be improved to use the time at which the current set of regions were recorded.



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