Hi Derek, thanks for the information about r720xd. Seem that 24 drive chassis is also available. What is the advantage to use flexbay for ssd ? Bypass the back-plane ? ----- Mail original ----- De: "Derek Yarnell" <derek@xxxxxxxxxxxxxx> À: ceph-users@xxxxxxxxxxxxxx Envoyé: Mercredi 15 Janvier 2014 15:29:07 Objet: Re: Ceph / Dell hardware recommendation On 1/15/14, 9:20 AM, Mark Nelson wrote: > I guess I'd probably look at the R520 in an 8 bay configuration with an > E5-2407 and 4 1TB data disks per chassis (along with whatever OS disk > setup you want). That gives you 4 PCIE slots for the extra network > cards, the option for a hardware raid controller, and some expansion > options if you want to add more disks. It's not the densest chassis and > I've never tested performance on it, but it's a fairly straightforward > setup with no expanders to worry about and a cheap/fast CPU. Dell recently will sell now a R720xd with a pure LSI card in it (you will need to ask). This is important that the PERC controllers do not support JBOD mode and really for Ceph you don't want a hardware raid controller. They currently give me a hard time about trying to mix and match SSDs though on the 12 bay back-plane which is not a technical problem but a Dell problem. However you can get two flex bays in it which they allow you to put SSDs in. So you can get 12 4TB drives and 2 100G eMLC drives in 2U. Thanks, derek -- Derek T. Yarnell University of Maryland Institute for Advanced Computer Studies _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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