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From Upayavira ...@odoko.co.uk>
Subject Re: Pause and resume indexing on SolR 4 for backups
Date Thu, 20 Dec 2012 17:28:35 GMT
Are you sure a commit didn't happen between? Also, a background merge
might have happened.

As to using a backup, you are right, just stop solr, put the snapshot
into index/data, and restart.

Upayavira

On Thu, Dec 20, 2012, at 05:16 PM, Andy D'Arcy Jewell wrote:
> On 20/12/12 13:38, Upayavira wrote:
> > The backup directory should just be a clone of the index files. I'm
> > curious to know whether it is a cp -r or a cp -lr that the replication
> > handler produces.
> >
> > You would prevent commits by telling your app not to commit. That is,
> > Solr only commits when it is *told* to.
> >
> > Unless you use autocommit, in which case I guess you could monitor your
> > logs for the last commit, and do your backup a 10 seconds after that.
> >
> >
> Hmm. Strange - the files created by the backup API don't seem to 
> correlate exactly with the files stored under the solr data directory:
> 
> andydj@me-solr01:~$ find /tmp/snapshot.20121220155853703/
> /tmp/snapshot.20121220155853703/
> /tmp/snapshot.20121220155853703/_2vq.fdx
> /tmp/snapshot.20121220155853703/_2vq_Lucene40_0.tim
> /tmp/snapshot.20121220155853703/segments_2vs
> /tmp/snapshot.20121220155853703/_2vq_nrm.cfs
> /tmp/snapshot.20121220155853703/_2vq.fnm
> /tmp/snapshot.20121220155853703/_2vq_nrm.cfe
> /tmp/snapshot.20121220155853703/_2vq_Lucene40_0.frq
> /tmp/snapshot.20121220155853703/_2vq.fdt
> /tmp/snapshot.20121220155853703/_2vq.si
> /tmp/snapshot.20121220155853703/_2vq_Lucene40_0.tip
> andydj@me-solr01:~$ find /var/lib/solr/data/index/
> /var/lib/solr/data/index/
> /var/lib/solr/data/index/_2w6_Lucene40_0.frq
> /var/lib/solr/data/index/_2w6.si
> /var/lib/solr/data/index/segments_2w8
> /var/lib/solr/data/index/write.lock
> /var/lib/solr/data/index/_2w6_nrm.cfs
> /var/lib/solr/data/index/_2w6.fdx
> /var/lib/solr/data/index/_2w6_Lucene40_0.tip
> /var/lib/solr/data/index/_2w6_nrm.cfe
> /var/lib/solr/data/index/segments.gen
> /var/lib/solr/data/index/_2w6.fnm
> /var/lib/solr/data/index/_2w6.fdt
> /var/lib/solr/data/index/_2w6_Lucene40_0.tim
> 
> Am I correct in thinking that to restore from this backup, I would need 
> to do the following?
> 
> 1. Stop Tomcat (or maybe just solr)
> 2. Remove all files under /var/lib/solr/data/index/
> 3. Move/copy files from /tmp/snapshot.20121220155853703/ to 
> /var/lib/solr/data/index/
> 4. Restart Tomcat (or just solr)
> 
> 
> Thanks everyone who's pitched in on this! Once I've got this working, 
> I'll document it.
> -Andy
> 
> -- 
> Andy D'Arcy Jewell
> 
> SysMicro Limited
> Linux Support
> E:  andy.jewell@sysmicro.co.uk
> W:  www.sysmicro.co.uk
> 

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