> In this case, can a single block device (for example a huge virtual > machine image) be striped across many OSDs to archieve better > performance in reading? > an image striped across 3 disks, should get 3*IOPS when reading Yes, but network (and many other isssues) must be considered. > Another question: in a standard RGW/RBD infrastructure (no CephFS), I > have to configure only "mon" and "osd" nodes, right? Yes. > How many monitor nodes is suggested? 3 is suggested. On 30 October 2012 22:31, Gandalf Corvotempesta <gandalf.corvotempesta@xxxxxxxxx> wrote: > 2012/10/30 袁冬 <yuandong1222@xxxxxxxxx>: >> RGW and libRBD are not the same pool, you can`t access aRBD volume with >> RGW. The RADOS treats the RBD volume as just a large object. > > Ok, I think to have understood. RADOS store only object on an existent > filesystem (this is why I have to create a FS to use RADOS/Ceph). > Now, if that object is accessed by RGW, that object will be a single > file stored on the FS but if I'm accessing > with RBD, RBD is masking a very large object, stored on FS, as it is a > single block device. > In this case, can a single block device (for example a huge virtual > machine image) be striped across many OSDs to archieve better > performance in reading? > an image striped across 3 disks, should get 3*IOPS when reading > > > Another question: in a standard RGW/RBD infrastructure (no CephFS), I > have to configure only "mon" and "osd" nodes, right? > How many monitor nodes is suggested? -- 袁冬 Email:yuandong1222@xxxxxxxxx QQ:10200230 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
