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From "Jay (JIRA)" <j...@apache.org>
Subject [jira] Created: (SOLR-1315) new replication command needed to force a backup when there is no committed index data
Date Tue, 28 Jul 2009 23:25:15 GMT
new replication command needed to force a backup when there is no committed index data
--------------------------------------------------------------------------------------

                 Key: SOLR-1315
                 URL: https://issues.apache.org/jira/browse/SOLR-1315
             Project: Solr
          Issue Type: New Feature
          Components: replication (java)
    Affects Versions: 1.4
         Environment: Mac OS
            Reporter: Jay
            Priority: Minor
             Fix For: 1.4


Here is an email describing the problem, and a possible solution.



I agree. I think both options could be useful - perhaps a 'forceBackup' as
well? Documentation would take care of the rest. Have you added this info to
the wiki yet?
--
- Mark

http://www.lucidimagination.com

On Thu, Jul 23, 2009 at 12:56 PM, solr jay <solrjay@gmail.com> wrote:

> Hi,
>
> I noticed that the backup request
>
> http://master_host:port/solr/replication?command=backup<
> http://master_host/solr/replication?command=backup>
- Hide quoted text -
>
> works only if there are committed index data, i.e.
> core.getDeletionPolicy().getLatestCommit() is not null. Otherwise, no
> backup
> is created. It sounds logical because if nothing has been committed since
> your last backup, it doesn't help much to do a new backup. However,
> consider
> this scenario:
>
> 1. a backup process is scheduled at 1:00AM every Monday
> 2. just before 1:00AM, the system is shutdown (for whatever reason), and
> then restarts
> 3. No index is committed before 1:00AM
> 4. at 1:00AM, backup process starts and no committed index is found, and
> therefore no backup (until next week)
>
> The probability of this scenario is probably small, but it still could
> happen, and it seems to me that if I want to backup index, a backup should
> be created whether there are new committed index or not.
>
> Your thoughts?
>
> Thanks,

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