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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] [Commented] (OAK-2879) Compaction should check for required disk space before running
Date Thu, 10 Sep 2015 07:40:46 GMT

    [ https://issues.apache.org/jira/browse/OAK-2879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14738346#comment-14738346

Michael Dürig commented on OAK-2879:

Instead of checking disk space *before* running compaction a better solution would be to monitor
disk space *during* compaction. Once it drops below a certain threshold, bail out and log.
The extra segments introduced by the aborted compaction run will then get collected by the
subsequent cleanup run. 

[~frm] assigning to you as discussed. 

> Compaction should check for required disk space before running
> --------------------------------------------------------------
>                 Key: OAK-2879
>                 URL: https://issues.apache.org/jira/browse/OAK-2879
>             Project: Jackrabbit Oak
>          Issue Type: Sub-task
>          Components: segmentmk
>            Reporter: Michael Dürig
>            Assignee: Michael Dürig
>              Labels: compaction, doc-impacting, gc, resilience
>             Fix For: 1.3.7
> In the worst case compaction doubles the repository size while running. As this is somewhat
unexpected we should check whether there is enough free disk space before running compaction
and log a warning otherwise. This is to avoid a common source of running out of disk space
and ending up with a corrupted repository. 

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