Re: [ceph-users] Questions regarding hardware design of an SSD only cluster

2018-04-24 Thread Christian Balzer
Hello, On Tue, 24 Apr 2018 11:39:33 +0200 Florian Florensa wrote: > 2018-04-24 3:24 GMT+02:00 Christian Balzer : > > Hello, > > > > Hi Christian, and thanks for your detailed answer. > > > On Mon, 23 Apr 2018 17:43:03 +0200 Florian Florensa wrote: > > > >> Hello everyone, > >> > >> I am in

Re: [ceph-users] Questions regarding hardware design of an SSD only cluster

2018-04-24 Thread Wido den Hollander
On 04/24/2018 05:01 AM, Mohamad Gebai wrote: > > > On 04/23/2018 09:24 PM, Christian Balzer wrote: >> >>> If anyone has some ideas/thoughts/pointers, I would be glad to hear them. >>> >> RAM, you'll need a lot of it, even more with Bluestore given the current >> caching. >> I'd say 1GB per TB

Re: [ceph-users] Questions regarding hardware design of an SSD only cluster

2018-04-24 Thread Florian Florensa
2018-04-24 3:24 GMT+02:00 Christian Balzer : > Hello, > Hi Christian, and thanks for your detailed answer. > On Mon, 23 Apr 2018 17:43:03 +0200 Florian Florensa wrote: > >> Hello everyone, >> >> I am in the process of designing a Ceph cluster, that will contain >> only SSD OSDs, and I was wonderi

Re: [ceph-users] Questions regarding hardware design of an SSD only cluster

2018-04-23 Thread Mohamad Gebai
On 04/23/2018 09:24 PM, Christian Balzer wrote: > >> If anyone has some ideas/thoughts/pointers, I would be glad to hear them. >> > RAM, you'll need a lot of it, even more with Bluestore given the current > caching. > I'd say 1GB per TB storage as usual and 1-2GB extra per OSD. Does that still

Re: [ceph-users] Questions regarding hardware design of an SSD only cluster

2018-04-23 Thread Christian Balzer
Hello, On Mon, 23 Apr 2018 17:43:03 +0200 Florian Florensa wrote: > Hello everyone, > > I am in the process of designing a Ceph cluster, that will contain > only SSD OSDs, and I was wondering how should I size my cpu. Several threads about this around here, but first things first. Any specifics

[ceph-users] Questions regarding hardware design of an SSD only cluster

2018-04-23 Thread Florian Florensa
Hello everyone, I am in the process of designing a Ceph cluster, that will contain only SSD OSDs, and I was wondering how should I size my cpu. The cluster will only be used for block storage. The OSDs will be Samsung PM863 (2Tb or 4Tb, this will be determined when we will set the total volumetry