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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] [Commented] (OAK-3774) Tool for detecting references to pre compacted segments
Date Tue, 15 Dec 2015 12:55:46 GMT

    [ https://issues.apache.org/jira/browse/OAK-3774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15058016#comment-15058016
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Michael Dürig commented on OAK-3774:
------------------------------------

Initial version at http://svn.apache.org/viewvc?rev=1720117&view=rev

The graph run mode of {{oak-run}} now takes {{--gc}} causing it to write a graph of gc generations:


{noformat}
nodedef>name VARCHAR
2
0
5
4
edgedef>node1 VARCHAR, node2 VARCHAR, weight INT
5,4,34
{noformat}

This means there are gc generations 0, 2, 5, and 4. Generations 5 has 34 referenced to generation
4. 

> Tool for detecting references to pre compacted segments
> -------------------------------------------------------
>
>                 Key: OAK-3774
>                 URL: https://issues.apache.org/jira/browse/OAK-3774
>             Project: Jackrabbit Oak
>          Issue Type: Technical task
>          Components: segmentmk
>            Reporter: Michael Dürig
>            Assignee: Michael Dürig
>              Labels: compaction, gc, tooling
>             Fix For: 1.4
>
>
> While OAK-3560 allows us to detect reference to pre compacted segments through manual
inspection, we also need tooling to help detect such cases on site, during longevity tests
and for UT/IT.  



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