Yep, that motivated my question "Do you have any idea what kind of disk performance you need?". If you need the performance, its hard to beat ephemeral SSD in RAID 0 on EC2, and its a solid, battle tested configuration. If you don't, though, EBS GP2 will save a _lot_ of headache.
Personally, on small clusters like ours (12 nodes), we've found our choice of instance dictated much more by the balance of price, CPU, and memory. We're using GP2 SSD and we find that for our patterns the disk is rarely the bottleneck. YMMV, of course. On Fri, Jan 29, 2016 at 7:32 PM, Jeff Jirsa <jeff.ji...@crowdstrike.com> wrote: > If you have to ask that question, I strongly recommend m4 or c4 instances > with GP2 EBS. When you don’t care about replacing a node because of an > instance failure, go with i2+ephemerals. Until then, GP2 EBS is capable of > amazing things, and greatly simplifies life. > > We gave a talk on this topic at both Cassandra Summit and AWS re:Invent: > https://www.youtube.com/watch?v=1R-mgOcOSd4 It’s very much a viable > option, despite any old documents online that say otherwise. > > > > From: Eric Plowe > Reply-To: "user@cassandra.apache.org" > Date: Friday, January 29, 2016 at 4:33 PM > To: "user@cassandra.apache.org" > Subject: EC2 storage options for C* > > My company is planning on rolling out a C* cluster in EC2. We are thinking > about going with ephemeral SSDs. The question is this: Should we put two in > RAID 0 or just go with one? We currently run a cluster in our data center > with 2 250gig Samsung 850 EVO's in RAID 0 and we are happy with the > performance we are seeing thus far. > > Thanks! > > Eric >
