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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] [Updated] (OAK-5790) Chronologically rebase checkpoints on top of each other during compaction
Date Thu, 01 Jun 2017 13:57:04 GMT

     [ https://issues.apache.org/jira/browse/OAK-5790?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael Dürig updated OAK-5790:
-------------------------------
    Fix Version/s:     (was: 1.7.1)
                   1.7.2

> Chronologically rebase checkpoints on top of each other during compaction
> -------------------------------------------------------------------------
>
>                 Key: OAK-5790
>                 URL: https://issues.apache.org/jira/browse/OAK-5790
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: segment-tar
>            Reporter: Michael Dürig
>            Assignee: Michael Dürig
>              Labels: compaction, gc, performance
>             Fix For: 1.8, 1.7.2
>
>         Attachments: size over time.png
>
>
> Currently the compactor does just a rewrite of the super root node without any special
handling of the checkpoints. It just relies on the node de-duplication cache to avoid fully
exploding the checkpoints. 
> I think this can be improved by subsequently rebasing checkpoints on top of each other
during compaction. (Very much like checkpoints are handled in migration). 



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