Re: Question about EC2 and SSDs

EBS performance was a major concern a few years ago, but it's gotten better in the last few years with things like Provisioned IOPS and SSDs. However, it's still not recommended (reasons outlined here

Re: Question about EC2 and SSDs

Theory aside, I switched from "RAID of ephemerals" for data, and root volume for write log to single EBS-based SSD without any noticeable impact on performance. will On Thu, Sep 4, 2014 at 9:35 PM, Steve Robenalt wrote: > Yes, I am aware there are no heads on an SSD. I also have seen plenty of

Re: Question about EC2 and SSDs

Yes, I am aware there are no heads on an SSD. I also have seen plenty of examples where compatibility issues force awkward engineering tradeoffs, even as technology advances so I am jaded enough to be wary of making assumptions, which is why I asked the question. Steve On Sep 4, 2014 5:50 PM, "Rob

Re: Question about EC2 and SSDs

On 5 Sep 2014, at 10:05 am, Steve Robenalt wrote: > We are migrating a small cluster on AWS from instances based on spinning > disks (using instance store) to SSD-backed instances and we're trying to pick > the proper instance type. Some of the recommendations for spinning disks say > to use d

Re: Question about EC2 and SSDs

On Thu, Sep 4, 2014 at 5:44 PM, Steve Robenalt wrote: > Thanks Robert! I am assuming that you meant that it's possible with a > single SSD, right? > Yes, no matter how many SSDs you have you are unlikely to be able to convince one of them to physically seek a drive head across its plater, becaus

Re: Question about EC2 and SSDs

Thanks Robert! I am assuming that you meant that it's possible with a single SSD, right? On Thu, Sep 4, 2014 at 5:42 PM, Robert Coli wrote: > On Thu, Sep 4, 2014 at 5:05 PM, Steve Robenalt > wrote: > >> We are migrating a small cluster on AWS from instances based on spinning >> disks (using in

Re: Question about EC2 and SSDs

Thanks Rahul! That was my inclination, but I don't want to take things like that for granted. Anybody have a dissenting view? Steve On Thu, Sep 4, 2014 at 5:14 PM, Rahul Neelakantan wrote: > With SSD one drive should be sufficient for both data and commitLogs. > > Rahul Neelakantan > > > On S

Re: Question about EC2 and SSDs

On Thu, Sep 4, 2014 at 5:05 PM, Steve Robenalt wrote: > We are migrating a small cluster on AWS from instances based on spinning > disks (using instance store) to SSD-backed instances and we're trying to > pick the proper instance type. Some of the recommendations for spinning > disks say to use

Re: Question about EC2 and SSDs

With SSD one drive should be sufficient for both data and commitLogs. Rahul Neelakantan > On Sep 4, 2014, at 8:05 PM, Steve Robenalt wrote: > > Hi all, > > We are migrating a small cluster on AWS from instances based on spinning > disks (using instance store) to SSD-backed instances and we're

Question about EC2 and SSDs

Hi all, We are migrating a small cluster on AWS from instances based on spinning disks (using instance store) to SSD-backed instances and we're trying to pick the proper instance type. Some of the recommendations for spinning disks say to use different drives for log vs data partitions to avoid is