Re: [ceph-users] [a bit off-topic] Power usage estimation of hardware for Ceph

2015-04-12 Thread Francois Lafont
Christian Balzer wrote: > Simply put, a RAID1 of SSDs will require you to get twice as many SSDs as > otherwise needed. And most people don't want to spend that money. > In addition to that DC level SSDs tend to very reliable and your cluster > will have to be able to withstand losses like this an

Re: [ceph-users] [a bit off-topic] Power usage estimation of hardware for Ceph

2015-04-12 Thread Christian Balzer
On Sun, 12 Apr 2015 18:03:52 +0200 Francois Lafont wrote: > Hi, > > Christian Balzer wrote: > > >> I'm not sure to well understand: the model that I indicated in the > >> link above (page 2, model SSG-6027R-OSD040H in the table) already > >> have hotswap bays in the back, for OS drives. > >> > >

Re: [ceph-users] [a bit off-topic] Power usage estimation of hardware for Ceph

2015-04-12 Thread Francois Lafont
Chris Kitzmiller wrote: > Just as a single data point I can speak to my own nodes. I'm using SM 847A > [1] chassis. They're 4U, 36 x 3.5" hot swap bays with 2 internal 2.5" bays. > So: > > 30 x 7200 RPM SATA > 6 x SSD Journals > 2 x SSD OS / Mon > 2 x E5-2620 2.0GHz > >

Re: [ceph-users] [a bit off-topic] Power usage estimation of hardware for Ceph

2015-04-12 Thread Francois Lafont
Hi, Christian Balzer wrote: >> I'm not sure to well understand: the model that I indicated in the link >> above (page 2, model SSG-6027R-OSD040H in the table) already have hotswap >> bays in the back, for OS drives. >> > Yes, but that model is pre-configured: > 2x 2.5" 400GB SSDs, 10x 3.5" 4TB S

Re: [ceph-users] [a bit off-topic] Power usage estimation of hardware for Ceph

2015-04-08 Thread Christian Balzer
On Wed, 08 Apr 2015 14:59:21 +0200 Francois Lafont wrote: > Hi, > > Sorry in advance for this thread not directly linked to Ceph. ;) > We are thinking about buying servers to build a ceph cluster and we > would like to have, if possible, a *approximative* power usage > estimation of these servers

[ceph-users] [a bit off-topic] Power usage estimation of hardware for Ceph

2015-04-08 Thread Francois Lafont
Hi, Sorry in advance for this thread not directly linked to Ceph. ;) We are thinking about buying servers to build a ceph cluster and we would like to have, if possible, a *approximative* power usage estimation of these servers (this parameter could be important in your choice): 1. the 12xbays su