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From Jonathan Ellis <>
Subject Re: Running cassandra on a Blades + SAN
Date Thu, 11 Aug 2011 16:10:00 GMT
The SAN model defeats some of the point of using Cassandra, but a
"hybrid" of commitlog-local would be better than "everything on san."
is a good thread for background.

On Thu, Aug 11, 2011 at 8:56 AM, David McNelis
<> wrote:
> Hey folks,
> I was wondering if anyone has a cassandra cluster running on a server setup
> using blades, with a SAN appliance as the data file storage medium.
> I would expect that there would be performance  let-downs  if the SAN was
> connected with anything other than a fiber channel, but are there other
> drawbacks?  Imagine a system with something along the lines of 12 600G 10k
> SAS drives in a single SAN, with a bunch of dual proc, quad core blades as
> the hosts.  I would think that we'd have the commitlog live on the blade's
> internal drives would allow us to write data with sufficient throughput.
> Anyone have any thoughts on a Blade v. Rackable solution for spinning up a
> cassandra cluster?
> --
> David McNelis
> Lead Software Engineer
> Agentis Energy
> o: 630.359.6395
> c: 219.384.5143
> A Smart Grid technology company focused on helping consumers of energy
> control an often under-managed resource.

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

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