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> 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> 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
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