Re: Multiple large disks in server - setup considerations

2011-06-08 Thread Edward Capriolo
On Wed, Jun 8, 2011 at 12:19 AM, AJ wrote: > On 6/7/2011 9:32 PM, Edward Capriolo wrote: > > >> >> I do not like large disk set-ups. I think they end up not being >> economical. Most low latency use cases want high RAM to DISK ratio. Two >> machines with 32GB RAM is usually less expensive then

Re: Multiple large disks in server - setup considerations

2011-06-07 Thread AJ
On 6/7/2011 9:32 PM, Edward Capriolo wrote: I do not like large disk set-ups. I think they end up not being economical. Most low latency use cases want high RAM to DISK ratio. Two machines with 32GB RAM is usually less expensive then one machine with 64GB ram. For a machine with 1TB drive

Re: Multiple large disks in server - setup considerations

2011-06-07 Thread Edward Capriolo
On Tue, Jun 7, 2011 at 12:43 PM, Ryan King wrote: > On Tue, Jun 7, 2011 at 4:34 AM, Erik Forsberg wrote: > > On Tue, 31 May 2011 13:23:36 -0500 > > Jonathan Ellis wrote: > > > >> Have you read http://wiki.apache.org/cassandra/CassandraHardware ? > > > > I had, but it was a while ago so I guess

Re: Multiple large disks in server - setup considerations

2011-06-07 Thread Ryan King
On Tue, Jun 7, 2011 at 4:34 AM, Erik Forsberg wrote: > On Tue, 31 May 2011 13:23:36 -0500 > Jonathan Ellis wrote: > >> Have you read http://wiki.apache.org/cassandra/CassandraHardware ? > > I had, but it was a while ago so I guess I kind of deserved an RTFM! :-) > > After re-reading it, I still w

Re: Multiple large disks in server - setup considerations

2011-06-07 Thread Erik Forsberg
On Tue, 31 May 2011 13:23:36 -0500 Jonathan Ellis wrote: > Have you read http://wiki.apache.org/cassandra/CassandraHardware ? I had, but it was a while ago so I guess I kind of deserved an RTFM! :-) After re-reading it, I still want to know: * If we disregard the performance hit caused by havi

Re: Multiple large disks in server - setup considerations

2011-05-31 Thread Jonathan Ellis
Have you read http://wiki.apache.org/cassandra/CassandraHardware ? On Tue, May 31, 2011 at 7:47 AM, Erik Forsberg wrote: > Hi! > > I'm considering setting up a small (4-6 nodes) Cassandra cluster on > machines that each have 3x2TB disks. There's no hardware RAID in the > machine, and if there wer

Multiple large disks in server - setup considerations

2011-05-31 Thread Erik Forsberg
Hi! I'm considering setting up a small (4-6 nodes) Cassandra cluster on machines that each have 3x2TB disks. There's no hardware RAID in the machine, and if there were, it could only stripe single disks together, not parts of disks. I'm planning RF=2 (or higher). I'm pondering what the best dis