I agree with Michael that you'll only ever need your backup if you lose all nodes hosting a shard (leader + all other replicas), so the tlog doesn't really factor in when recovering from backup.
The snapshot created by the replication handler is the index only and it makes most sense in my mind to remove the tlog before firing up a new node using the snapshot. The way I see it, the backup would be needed if you lost all nodes hosting a shard, then you need to 1) recover one node (the leader) from backup, 2) re-index any documents that were indexed between the time of your last snapshot and the time of the failure, then 3) bring additional replicas online as needed. The additional replicas will sync with the leader, snap pulling the entire index. You could do it 1,2,3 or 1,3,2. Cheers, Tim On Tue, Apr 30, 2013 at 12:45 PM, Furkan KAMACI <furkankam...@gmail.com> wrote: > I had index and tlog folder under my data folder. I have a snapshot folder > too when I make backup. However what will I do next if I want to use > backup, will I remove index and tlog folders and put just my snapshot > folder? What folks do? > > 2013/4/30 Michael Della Bitta <michael.della.bi...@appinions.com> > >> Presumably you'd only be restoring a backup in the face of a catastrophe. >> >> Yes, you'd need to stop the node. And the transaction logs may not be >> useful in this case. You'd have trouble reconciling them with the version >> of the index in your backup I would think. >> >> Anybody who knows more about this want to chime in? >> >> >> Michael Della Bitta >> >> ------------------------------------------------ >> Appinions >> 18 East 41st Street, 2nd Floor >> New York, NY 10017-6271 >> >> www.appinions.com >> >> Where Influence Isn’t a Game >> >> >> On Tue, Apr 30, 2013 at 11:03 AM, Furkan KAMACI <furkankam...@gmail.com >> >wrote: >> >> > Should I stop the node first? And what will happen to transaction logs? >> > Should I backup it too? >> > >> > 2013/4/30 Michael Della Bitta <michael.della.bi...@appinions.com> >> > >> > > That directory is the data directory for the core... you'd just swap it >> > in. >> > > >> > > >> > > Michael Della Bitta >> > > >> > > ------------------------------------------------ >> > > Appinions >> > > 18 East 41st Street, 2nd Floor >> > > New York, NY 10017-6271 >> > > >> > > www.appinions.com >> > > >> > > Where Influence Isn’t a Game >> > > >> > > >> > > On Tue, Apr 30, 2013 at 8:06 AM, Furkan KAMACI <furkankam...@gmail.com >> > > >wrote: >> > > >> > > > Hi Folks; >> > > > >> > > > I can backup my indexes at SolrCloud via >> > > > http://_master_host_:_port_/solr/replication?command=backup >> > > > and it creates a file called snapshot. I know that I should pull that >> > > > directory any other safe place (a backup store) However what should I >> > do >> > > to >> > > > make a recovery from that backup file? >> > > > >> > > >> > >>
