Hi will, Quickly did a snapshot:
nodetool -h 10.0.0.2 -p 8080 snapshot 09032011 The snapshots end up in the data dir for cassandra. The default is /var/lib/cassandra/data/<keyspace>/snapshots/ In this directory i have: 1299689801925-09032011 -sd On Wed, Mar 9, 2011 at 5:54 PM, William Oberman <ober...@civicscience.com>wrote: > I haven't done backups yet, so I don't know where the data is written. Is > it where the nodetool is run from? Or local to the instance running > cassandra (and there, local to the data directory?). I assumed it was the > latter (not finding docs on that yet), and that would require 2x storage > allocated on that instance for 1x data (to have room for the snapshot). If > its the former, then yes, I'd totally run the command from an ephemeral > store, and backup to S3. > > will > > > On Wed, Mar 9, 2011 at 11:48 AM, Sasha Dolgy <sdo...@gmail.com> wrote: > >> Hi Will, >> >> http://wiki.apache.org/cassandra/Operations#Backing_up_data >> >> <http://wiki.apache.org/cassandra/Operations#Backing_up_data>If the >> snapshot is written to the ephemeral storage ... there isn't a cost. (i need >> to confirm that) >> >> You can then move this to an S3 bucket with RDS if you want or full >> 99.999999999% redundancy and have it available to developers >> >> This is what I had in my head.... >> -sd >> >> >> On Wed, Mar 9, 2011 at 5:39 PM, William Oberman <ober...@civicscience.com >> > wrote: >> >>> I thought nodetool snapshot writes the snapshot locally, requiring 2x of >>> expensive storage allocation 24x7 (vs. cheap storage allocation of a ebs >>> snapshot). By that I mean EBS allocation is GB allocated per month costs at >>> one rate, and EBS snapshots are delta compressed copies to S3. >>> >>> Can you point the snapshot to an external filesystem? >>> >>> will >>> >>> > > > -- > Will Oberman > Civic Science, Inc. > 3030 Penn Avenue., First Floor > Pittsburgh, PA 15201 > (M) 412-480-7835 > (E) ober...@civicscience.com > -- Sasha Dolgy sasha.do...@gmail.com
