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From Sasha Dolgy <>
Subject Re: best way to backup
Date Thu, 28 Apr 2011 19:57:30 GMT
You could take a snapshot to an EBS volume.  then, take a snapshot of that
via AWS.  of course, this is ok.when they -arent- having outages and issues
On Apr 28, 2011 9:54 PM, "William Oberman" <> wrote:
> Even with N-nodes for redundancy, I still want to have backups. I'm an
> amazon person, so naturally I'm thinking S3. Reading over the docs, and
> messing with nodeutil, it looks like each new snapshot contains the
> snapshot as a subset (and I've read how cassandra uses hard links to avoid
> excessive disk use). When does that pattern break down?
> I'm basically debating if I can do a "rsync" like backup, or if I should
> a compressed tar backup. And I obviously want multiple points in time. S3
> does allow file versioning, if a file or file name is changed/resused over
> time (only matters in the rsync case). My only concerns with compressed
> tars is I'll have to have free space to create the archive and I get no
> "delta" space savings on the backup (the former is solved by not allowing
> the disk space to get so low and/or adding more nodes to bring down the
> space, the latter is solved by S3 being really cheap anyways).
> --
> Will Oberman
> Civic Science, Inc.
> 3030 Penn Avenue., First Floor
> Pittsburgh, PA 15201
> (M) 412-480-7835
> (E)

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