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https://issues.apache.org/jira/browse/OAK-5655?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Dürig updated OAK-5655:
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Attachment: segment-reads.png
> TarMK: Analyse locality of reference
> -------------------------------------
>
> Key: OAK-5655
> URL: https://issues.apache.org/jira/browse/OAK-5655
> Project: Jackrabbit Oak
> Issue Type: Task
> Components: segment-tar
> Reporter: Michael Dürig
> Priority: Major
> Labels: scalability
> Fix For: 1.10
>
> Attachments: compaction-time-vs-reposize.m,
> compaction-time-vs.reposize.png, data00053a.tar-reads.png, offrc.jfr,
> segment-per-path-compacted-nocache.png,
> segment-per-path-compacted-nostringcache.png, segment-per-path-compacted.png,
> segment-per-path.png, segment-reads.png
>
>
> We need to better understand the locality aspects of content stored in TarMK:
> * How is related content spread over segments?
> * What content do we consider related?
> * How does locality of related content develop over time when changes are
> applied?
> * What changes do we consider typical?
> * What is the impact of compaction on locality?
> * What is the impact of the deduplication caches on locality (during normal
> operation and during compaction)?
> * How good are checkpoints deduplicated? Can we monitor this online?
> * ...
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