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https://issues.apache.org/jira/browse/SOLR-13608?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17278836#comment-17278836
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ASF subversion and git services commented on SOLR-13608:
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Commit 33d16b570c7630fde784552193ad495b63abd3e3 in lucene-solr's branch
refs/heads/master from Jason Gerlowski
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=33d16b5 ]
SOLR-13608: Incremental backup file format (#2250)
This commit introduces a new way for Solr to do backups (with a new
underlying file structure). This new "incremental" backup process
improves over the existing backup mechanism in several ways:
- multiple backups "points" can now be stored at a given backup
location/name, allowing users to choose which point in time they want
to restore
- subsequent backups skip over uploading files that were uploaded by
previous backups, saving time and network time.
- files are checksumed as they're uploaded, ensuring that corrupted
indices aren't persisted and accidentally restored later.
Incremental backups are now the default, and traditional backups
should now be considered 'deprecated' but can still be created by
passing an `incremental=false` parameter on backup requests.
> Incremental backup for Solr
> ---------------------------
>
> Key: SOLR-13608
> URL: https://issues.apache.org/jira/browse/SOLR-13608
> Project: Solr
> Issue Type: Sub-task
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Cao Manh Dat
> Assignee: Jason Gerlowski
> Priority: Major
> Time Spent: 81h 10m
> Remaining Estimate: 15h 50m
>
> SIP-12 lays out a plan for adding support for incremental backups to Solr.
> At a high level, the idea is that Solr will be able to store multiple backups
> in the same location, and backups beyond the first one will only upload those
> files that were not uploaded by previous backups.
> This involves changes to the file structure within a particular backup
> location. It also entails changes to some of the backup/restore API
> parameters and semantics, to accommodate storing multiple backups in the same
> place, etc.
> This ticket covers the changes required for this functionality, as described
> in SIP-12 unless mentioned specifically below. It does not implement all of
> [SIP-12.|https://cwiki.apache.org/confluence/display/SOLR/SIP-12%3A+Incremental+Backup+and+Restore]
> Same-collection-restoration, support for popular proprietary blob stores,
> etc. are left for separate tickets in an attempt to keep PRs manageable and
> conceptually cohesive.
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