Adding a Single Point of Failure when you chose a distributed database for probably a good reason. I'd also think you'd be tempted to have multiple terabytes per node. (so you're even more cost inefficient because you'll still need to buy the same number of nodes everyone else does even though you have the SAN). Then any operations are going to be unbearable (repair, cleanup). Also if you want to be multi dc, now you'll need two SANS.
I can't think of one good reason to run C* with a SAN. From: Kanwar Sangha <kan...@mavenir.com<mailto:kan...@mavenir.com>> Reply-To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto:user@cassandra.apache.org>> Date: Thursday, February 21, 2013 3:42 PM To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto:user@cassandra.apache.org>> Subject: RE: Cassandra with SAN Ok. What would be the drawbacks :) From: Michael Kjellman [mailto:mkjell...@barracuda.com] Sent: 21 February 2013 17:12 To: user@cassandra.apache.org<mailto:user@cassandra.apache.org> Subject: Re: Cassandra with SAN No, this is a really really bad idea and C* was not designed for this, in fact, it was designed so you don't need to have a large expensive SAN. Don't be tempted by the shiny expensive SAN. :) If money is no object instead throw SSD's in your nodes and run 10G between racks From: Kanwar Sangha <kan...@mavenir.com<mailto:kan...@mavenir.com>> Reply-To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto:user@cassandra.apache.org>> Date: Thursday, February 21, 2013 2:56 PM To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto:user@cassandra.apache.org>> Subject: Cassandra with SAN Hi – Is it a good idea to use Cassandra with SAN ? Say a SAN which provides me 8 Petabytes of storage. Would I not be I/O bound irrespective of the no of Cassandra machines and scaling by adding machines won’t help ? Thanks Kanwar ---------------------------------- Copy, by Barracuda, helps you store, protect, and share all your amazing things. Start today: www.copy.com<http://www.copy.com?a=em_footer>. Copy, by Barracuda, helps you store, protect, and share all your amazing things. Start today: www.copy.com.
