For production I'd stick with ephemeral disks (aka instance storage) if you have running a lot of transaction. However, for regular small testing/qa cluster, or something you know you want to reload often, EBS is definitely good enough and we haven't had issues 99%. The 1% is kind of anomaly where we have flush blocked.
But Jeff, kudo that you are able to use EBS. I didn't go through the video, do you actually use PIOPS or just standard GP2 in your production cluster? On Sat, Jan 30, 2016 at 1:28 PM, Bryan Cheng <br...@blockcypher.com> wrote: > 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 >> > >
