Re: [ceph-users] ssd OSD and disk controller limitation

2015-02-03 Thread mad Engineer
Thanks Florent On Mon, Feb 2, 2015 at 11:26 PM, Florent MONTHEL fmont...@flox-arts.net wrote: Hi, Writes will be distributed every 4MB (size of IMAGEV1 RBD object) IMAGEV2 not fully supported on KRBD (but you can customize size of object and striping) You need to take : - SSD SATA 6gbits

Re: [ceph-users] ssd OSD and disk controller limitation

2015-02-02 Thread Florent MONTHEL
Hi Mad 3Gbps so you will have SSD Sata ? I think you should take 6Gbps controllers to make sure so not have Sata limitations Thanks Sent from my iPhone On 2 févr. 2015, at 09:27, mad Engineer themadengin...@gmail.com wrote: I am trying to create a 5 node cluster using 1 Tb SSD disks with 2

Re: [ceph-users] ssd OSD and disk controller limitation

2015-02-02 Thread Florent MONTHEL
Hi, Writes will be distributed every 4MB (size of IMAGEV1 RBD object) IMAGEV2 not fully supported on KRBD (but you can customize size of object and striping) You need to take : - SSD SATA 6gbits - or SSD SAS 12gbits (more expensive) Florent Monthel Le 2 févr. 2015 à 18:29, mad

Re: [ceph-users] ssd OSD and disk controller limitation

2015-02-02 Thread mad Engineer
Thanks Florent, can ceph distribute write to multiple hosts? On Mon, Feb 2, 2015 at 10:17 PM, Florent MONTHEL fmont...@flox-arts.net wrote: Hi Mad 3Gbps so you will have SSD Sata ? I think you should take 6Gbps controllers to make sure so not have Sata limitations

[ceph-users] ssd OSD and disk controller limitation

2015-02-02 Thread mad Engineer
I am trying to create a 5 node cluster using 1 Tb SSD disks with 2 OSD on each server.Each server will have 10G NIC. SSD disks are of good quality and as per label it can support ~300 MBps What are the limiting factor that prevents from utilizing full speed of SSD disks? Disk controllers are 3