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From William Oberman <>
Subject Re: Aamzon EC2 & Cassandra to ebs or not..
Date Wed, 09 Mar 2011 15:54:26 GMT
I'm considering similar issues right now.  The problem with ephemeral
storage is I don't know an easy way to back it up, while on an EBS it's a
simple snapshot API call.

Otherwise, I believe the performance of the ephemeral (certainly in the case
of large or greater, where you can RAID0 multiple disks) is way better than


On Wed, Mar 9, 2011 at 10:27 AM, Sasha Dolgy <> wrote:

> Hi Everyone,
> Now that I'm past the problems of IP addresses changing ... I am onto the
> idea of storage.  Initially I had though that for each cassandra instance, I
> should have an EBS volume to store all the cassandra data / information.
> Now I'm starting to wonder if this is duplication and not necessary.  If an
> instance dies, I loose anything that's not attached to EBS.  However, if the
> cassandra cluster is healthy ... this shouldn't be an issue ... Is this a
> correct assumption?
> -sd
> --
> Sasha Dolgy

Will Oberman
Civic Science, Inc.
3030 Penn Avenue., First Floor
Pittsburgh, PA 15201
(M) 412-480-7835

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