Jeff, If EBS goes down, then EBS Gp2 will go down as well, no? I'm not discounting EBS, but prior outages are worrisome.
On Sunday, January 31, 2016, Jeff Jirsa <jeff.ji...@crowdstrike.com> wrote: > Free to choose what you'd like, but EBS outages were also addressed in > that video (second half, discussion by Dennis Opacki). 2016 EBS isn't the > same as 2011 EBS. > > -- > Jeff Jirsa > > > On Jan 31, 2016, at 8:27 PM, Eric Plowe <eric.pl...@gmail.com > <javascript:_e(%7B%7D,'cvml','eric.pl...@gmail.com');>> wrote: > > Thank you all for the suggestions. I'm torn between GP2 vs Ephemeral. GP2 > after testing is a viable contender for our workload. The only worry I have > is EBS outages, which have happened. > > On Sunday, January 31, 2016, Jeff Jirsa <jeff.ji...@crowdstrike.com > <javascript:_e(%7B%7D,'cvml','jeff.ji...@crowdstrike.com');>> wrote: > >> Also in that video - it's long but worth watching >> >> We tested up to 1M reads/second as well, blowing out page cache to ensure >> we weren't "just" reading from memory >> >> >> >> -- >> Jeff Jirsa >> >> >> On Jan 31, 2016, at 9:52 AM, Jack Krupansky <jack.krupan...@gmail.com> >> wrote: >> >> How about reads? Any differences between read-intensive and >> write-intensive workloads? >> >> -- Jack Krupansky >> >> On Sun, Jan 31, 2016 at 3:13 AM, Jeff Jirsa <jeff.ji...@crowdstrike.com> >> wrote: >> >>> Hi John, >>> >>> We run using 4T GP2 volumes, which guarantee 10k iops. Even at 1M writes >>> per second on 60 nodes, we didn’t come close to hitting even 50% >>> utilization (10k is more than enough for most workloads). PIOPS is not >>> necessary. >>> >>> >>> >>> From: John Wong >>> Reply-To: "user@cassandra.apache.org" >>> Date: Saturday, January 30, 2016 at 3:07 PM >>> To: "user@cassandra.apache.org" >>> Subject: Re: EC2 storage options for C* >>> >>> 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 >>>>> >>>> >>>> >>> >>
