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https://issues.apache.org/jira/browse/SOLR-10591?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15991501#comment-15991501
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Shawn Heisey commented on SOLR-10591:
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I have not actually used the backup feature, but I would be VERY surprised if a
"merge" was possible. Pretty sure that restoring an index will make the index
identical to the backup, because I think it's a file level operation. Merging
the indexes would require *document* level operations.
> Backup and Restore Solr Index based on Time
> -------------------------------------------
>
> Key: SOLR-10591
> URL: https://issues.apache.org/jira/browse/SOLR-10591
> Project: Solr
> Issue Type: Task
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Backup/Restore
> Affects Versions: 5.0
> Reporter: Avinash Gaddam
> Priority: Critical
>
> Hi,
> I am fairly new to Solr world, had an requirement regarding Backup/Solr data -
> Requirement -
> Currently we are Indexing Metadatasin Solr which has been for around year.
> We want to take a backup of data on Month to Month basis and restore the same
> when required. i.e. say - take back up of March data alone and restore the
> same back in the month of May.
> Tried till now –
> I was able to take back up of Complete Index and restore the same back as new
> Index.
> But unable to merge it with Current latest Index. Is this doable?
> Can I take Partial data Backup and Restore the same to the current Index.?
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