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https://issues.apache.org/jira/browse/OAK-1159?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13830038#comment-13830038
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Jukka Zitting commented on OAK-1159:
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Hmm, it looks like we're overly aggressive in avoiding copying of Blobs. I'll
add a check that a Blob copy is only skipped if the Blob being copied exists
within the same SegmentStore. Otherwise we'll end up with the case you're
seeing, where blobs are not being copied to a separate store.
> Backup and restore
> ------------------
>
> Key: OAK-1159
> URL: https://issues.apache.org/jira/browse/OAK-1159
> Project: Jackrabbit Oak
> Issue Type: New Feature
> Components: core, mk
> Reporter: Michael Marth
> Assignee: Alex Parvulescu
>
> We need a way to backup and restore a repository. I was thinking that the MK
> impl could expose an interface for this, as the actual implementation would
> differ quite a bit between e.g. TarMK and MongoMK.
> Also, I think we could leverage the MVCC nature of the MKs and mark a
> specific revision as "the revision to backup" (regardless of ongoing writes).
> That would allow us to prevent the ugly situation in JR2, that we need to
> stop writes for a while to produce a consistent backup.
> The restore in such a scenario would discard revisions that happened after
> said marker (but still made it into the backup).
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