you have a nice howto here http://www.sebastien-han.fr/blog/2012/12/07/ceph-2-speed-storage-with-crush/ on how to do this with crush rules.
On Fri, Jan 23, 2015 at 6:06 AM, Jason King <chn....@gmail.com> wrote: > Hi Don, > > Take a look at CRUSH settings. > http://ceph.com/docs/master/rados/operations/crush-map/ > > Jason > > 2015-01-22 2:41 GMT+08:00 Don Doerner <dondoer...@sbcglobal.net>: > >> OK, I've set up 'giant' in a single-node cluster, played with a >> replicated pool and an EC pool. All goes well so far. Question: I have >> two different kinds of HDD in my server - some fast, 15K RPM SAS drives and >> some big, slow (5400 RPM!) SATA drives. >> >> Right now, I have OSDs on all, and when I created my pool, it got spread >> over all of these drives like peanut butter. >> >> The documentation (e.g., the documentation on cache tiering) hints that >> its possible to differentiate fast from slow devices, but for the life of >> me, I can't see how to create a pool on specific OSDs. So it must be done >> some different way... >> >> Can someone please provide a pointer? >> >> Regards, >> >> -don- >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@lists.ceph.com >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >> > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >
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