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https://issues.apache.org/jira/browse/OAK-2619?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14629818#comment-14629818
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Michael Marth commented on OAK-2619:
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[~baedke], would this need some docu?
(adding the doc label anyway)
> Repeated upgrades
> -----------------
>
> Key: OAK-2619
> URL: https://issues.apache.org/jira/browse/OAK-2619
> Project: Jackrabbit Oak
> Issue Type: New Feature
> Components: upgrade
> Affects Versions: 1.1.7
> Reporter: Julian Sedding
> Assignee: Manfred Baedke
> Priority: Minor
> Labels: doc-impacting
> Fix For: 1.3.3
>
> Attachments: OAK-2619-v2.patch, OAK-2619.patch,
> incremental-upgrade-no-changes-mongo.png,
> incremental-upgrade-no-changes-tar.png, initial-upgrade-mongo.png,
> initial-upgrade-tar.png
>
>
> When upgrading from Jackrabbit 2 to Oak there are several scenarios that
> could benefit from the ability to upgrade repeatedly into one target
> repository.
> E.g. a migration process might look as follows:
> # upgrade a backup of a large repository a week before go-live
> # run the upgrade again every night (commit-hooks only handle delta)
> # run the upgrade one final time before go-live (commit-hooks only handle
> delta)
> In this scenario each upgrade would require a full traversal of the source
> repository. However, if done right, only the delta needs to be written and
> the commit-hooks also only need to process the delta.
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