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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] [Updated] (OAK-2801) Clear excess references before cleanup
Date Thu, 06 Aug 2015 15:06:05 GMT

     [ https://issues.apache.org/jira/browse/OAK-2801?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael Dürig updated OAK-2801:
-------------------------------
    Fix Version/s: 1.2.3
                   1.0.15

> Clear excess references before cleanup
> --------------------------------------
>
>                 Key: OAK-2801
>                 URL: https://issues.apache.org/jira/browse/OAK-2801
>             Project: Jackrabbit Oak
>          Issue Type: Sub-task
>          Components: segmentmk
>            Reporter: Michael Dürig
>            Assignee: Michael Dürig
>              Labels: compaction, gc, resilience
>             Fix For: 1.3.0, 1.2.3, 1.0.15
>
>         Attachments: OAK-2801.patch, with-OAK-2801.png, without-OAK-2801.png
>
>
> {{FileStore#cleanup}} would be more efficient when getting rid of as much references
as possibly beforehand. Excess references are contributed by the current {{TarWriter}} instance
and segment cache in {{SegmentTracker}}. 
> Those excess references turn out to be especially harmful with many concurrent writers
continuously writing to the repository. Starting with a certain write load clean up will become
completely blocked. 



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