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Posted to oak-issues@jackrabbit.apache.org by "Alex Parvulescu (JIRA)" <ji...@apache.org> on 2014/06/11 09:27:02 UTC

[jira] [Resolved] (OAK-1804) TarMK compaction

     [ https://issues.apache.org/jira/browse/OAK-1804?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alex Parvulescu resolved OAK-1804.
----------------------------------

    Resolution: Fixed

looks good, marking as fixed

> TarMK compaction
> ----------------
>
>                 Key: OAK-1804
>                 URL: https://issues.apache.org/jira/browse/OAK-1804
>             Project: Jackrabbit Oak
>          Issue Type: New Feature
>          Components: segmentmk
>            Reporter: Jukka Zitting
>            Assignee: Alex Parvulescu
>              Labels: production, tools
>             Fix For: 1.0.1, 1.1
>
>         Attachments: SegmentNodeStore.java.patch, compact-on-flush.patch, compaction-map-as-bytebuffer.patch, compaction.patch, fast-equals.patch
>
>
> The TarMK would benefit from periodic "compact" operations that would traverse and recreate (parts of) the content tree in order to optimize the storage layout. More specifically, such compaction would:
> * Optimize performance by increasing locality and reducing duplication, both of which improve the effectiveness of caching.
> * Allow the garbage collector to release more unused disk space by removing references to segments where only a subset of content is reachable.



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