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https://issues.apache.org/jira/browse/OAK-5004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15607673#comment-15607673
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Alex Parvulescu commented on OAK-5004:
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we originally had the compaction map, and more recently the node deduplication
cache. checkpoints usually consist of links to the root state, so most of the
nodes under a checkpoint should already by present in the deduplication cache.
> Offline compaction explodes checkpoints
> ----------------------------------------
>
> Key: OAK-5004
> URL: https://issues.apache.org/jira/browse/OAK-5004
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: segment-tar
> Reporter: Michael Dürig
> Labels: compaction, gc, tooling
> Fix For: Segment Tar 0.0.20
>
>
> Running offline compaction on a repository with checkpoints will explode
> those into full copies. Observed e.g. with OAK-5001.
> I think we should consider improving this by compacting checkpoints on top of
> each other in the proper order ({{oak-upgrade}} does this successfully).
> [~alex.parvulescu], WDYT? What was our take on this in the previous Oak
> versions?
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