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https://issues.apache.org/jira/browse/SOLR-15500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17396544#comment-17396544
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Jan Høydahl commented on SOLR-15500:
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Do you compare only index file names or also timestamp and size during 
incremental backup? I imagine it would be possible to keep a record of files 
backed up separate from the compressed backup? Or use gz compression on 
individual index files, or list files inside zip files (is that efficient 
remotely?).

> Compressed Backup
> -----------------
>
>                 Key: SOLR-15500
>                 URL: https://issues.apache.org/jira/browse/SOLR-15500
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Sayan Das
>            Priority: Major
>
> Right now in BliBli, we do dirty hacks to compress backups from the backup 
> scheduler VMs. It would be great if we can improve collection BACKUP command 
> with some expert flag which can compress the backup.



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