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 Engineer <themadengin...@gmail.com> a écrit : > > 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 >> 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 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 >>> _______________________________________________ >>> ceph-users mailing list >>> ceph-users@lists.ceph.com >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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