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From Jonathan Ellis <>
Subject Re: Aamzon EC2 & Cassandra to ebs or not..
Date Wed, 09 Mar 2011 17:17:57 GMT
Right, local snapshot is no-cost both from an EC2 pricing standpoint
and from a disk usage standpoint (because it uses hard links).

On Wed, Mar 9, 2011 at 10:48 AM, Sasha Dolgy <> wrote:
> Hi Will,
> 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 <>
> 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

Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support

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