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https://issues.apache.org/jira/browse/OAK-2849?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Dürig updated OAK-2849:
-------------------------------
Description:
This is a container issue for the ongoing effort to improve revision gc of the
SegmentMK.
I'm exploring
* ways to make the reference graph as exact as possible and necessary: it
should not contain segments that are not referenceable any more and but must
contain all segments that are referenceable.
* ways to segregate the reference graph reducing dependencies between certain
set of segments as much as possible.
* Reducing the number of in memory references and their impact on gc as much as
possible.
was:
This is a container issue for the ongoing effort to improve revision gc of the
SegmentMK.
I'm exploring
* ways to make the reference graph as exact as possible and necessary: it
should not contain segments that are not referenceable any more and but must
contain all segments that are referenceable.
* ways to segregate the reference graph reducing dependencies between certain
set of segments as much as possible.
* Reducing the number of in memory references and their impact on gc as much as
possible.
Work in progress is in my private [Github
fork|https://github.com/mduerig/jackrabbit-oak]. As soon as something is
promising enough to make it into Oak, I spawn of an issue an make it a subtask
of this task.
> Improve revision gc on SegmentMK
> --------------------------------
>
> Key: OAK-2849
> URL: https://issues.apache.org/jira/browse/OAK-2849
> Project: Jackrabbit Oak
> Issue Type: Task
> Components: segmentmk
> Reporter: Michael Dürig
> Assignee: Michael Dürig
> Labels: compaction, gc
> Fix For: 1.3.6
>
> Attachments: SegmentCompactionIT-conflicts.png
>
>
> This is a container issue for the ongoing effort to improve revision gc of
> the SegmentMK.
> I'm exploring
> * ways to make the reference graph as exact as possible and necessary: it
> should not contain segments that are not referenceable any more and but must
> contain all segments that are referenceable.
> * ways to segregate the reference graph reducing dependencies between certain
> set of segments as much as possible.
> * Reducing the number of in memory references and their impact on gc as much
> as possible.
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