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)
Thanks Florent, can ceph distribute write to multiple hosts? On Mon, Feb 2, 2015 at 10:17 PM, Florent MONTHEL < fmonthel@xxxxxxxxxxxxx> 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
Thanks
Sent from my iPhone
On 2 févr. 2015, at 09:27, mad Engineer <themadengin33r@xxxxxxxxx> wrote:
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 Gbps,so if i am not wrong this is the maximum
i can achieve per host.Can ceph distribute write parallely and over
come this limit of 3Gbps controller and thus fully utilize the
capability of ssd disks.
I have a working 3 node ceph setup deployed using ceph-deploy using
latest firefly and 3.16 kernel but this is on low quality SATA disks
and i am planning to upgrade to ssd
can some one please help me in understanding this better.
Thanks
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