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From "Bill Au (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SOLR-624) patch: Don't take snapshot if there are no differences
Date Thu, 10 Jul 2008 12:28:31 GMT

    [ https://issues.apache.org/jira/browse/SOLR-624?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12612458#action_12612458
] 

Bill Au commented on SOLR-624:
------------------------------

Yes, the '*' will cost problem if there are many snapshots.  The snappuller script has a shell
command to determine the latest snapshot on the master.  We can use the same command in snapshooter.

> patch: Don't take snapshot if there are no differences
> ------------------------------------------------------
>
>                 Key: SOLR-624
>                 URL: https://issues.apache.org/jira/browse/SOLR-624
>             Project: Solr
>          Issue Type: Improvement
>          Components: replication
>    Affects Versions: 1.3
>            Reporter: Richard "Trey" Hyde
>             Fix For: 1.3
>
>         Attachments: solr.check.patch
>
>
> This is similar in concept to a change I made several years ago in Solar.   Cronned snapshooters
can quickly generate a lot of snaps which will then be unnecessarily distributed to the slaves
if there hasn't been any changes in that period.
> Adds a "check" argument to make sure there where changes to the index before taking the
snap.

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