Yep, definitely use "osd crush reweigh" for your permanent data placement. Software Engineer #42 @ http://inktank.com | http://ceph.com
On Fri, Jun 27, 2014 at 12:13 AM, Micha Krause <mi...@krausam.de> wrote: > Hi, > > >> "ceph osd crush reweight" sets the CRUSH weight of the OSD. This >> weight is an arbitrary value (generally the size of the disk in TB or >> something) and controls how much data the system tries to allocate to >> the OSD. >> >> "ceph osd reweight" sets an override weight on the OSD. This value is >> in the range 0 to 1, and forces CRUSH to re-place (1-weight) of the >> data that would otherwise live on this drive. It does *not* change the >> weights assigned to the buckets above the OSD, and is a corrective >> measure in case the normal CRUSH distribution isn't working out quite >> right. (For instance, if one of your OSDs is at 90% and the others are >> at 50%, you could reduce this weight to try and compensate for it.) > > > thanks, so if I have some older osds, and I want them to receive less > data/iops > than the other nodes, I would use "ceph osd crush reweight"? > > Micha Krause _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
