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https://issues.apache.org/jira/browse/OAK-181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13416305#comment-13416305
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Alexander Klimetschek commented on OAK-181:
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{quote}If you want to copy the index data, then you do a full database
backup.{quote}
Which will be simpler if there are no separate lucene index in the file system,
but all inside the repository (and hence in the repository persistence layer).
That should be satisfied, regardless whether those index nodes will be exposed
via the JCR API or not.
But I still see the use case of copying via "packages" (built on top of the JCR
API): if you have one or more custom indexes for a large subtree, you can
easily copy them over this way, without having to run re-indexing on the target
instance.
> Observation / indexing: don't create events for index updates
> -------------------------------------------------------------
>
> Key: OAK-181
> URL: https://issues.apache.org/jira/browse/OAK-181
> Project: Jackrabbit Oak
> Issue Type: New Feature
> Reporter: Thomas Mueller
>
> If index data is stored in the repository (for example under
> jcr:system/oak:indexes), then each change in the content might result in one
> or multiple changed in the affected indexes.
> Observation events should only be created for content changes, not for index
> changes.
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