On Wed, 10 Jan 2018, Stefan Priebe - Profihost AG wrote: > Am 10.01.2018 um 22:23 schrieb Sage Weil: > > On Wed, 10 Jan 2018, Stefan Priebe - Profihost AG wrote: > >> k, > >> > >> in the past we used the python crush optimize tool to reweight the osd > >> usage - it inserted a 2nd tree with $hostname-target-weight as hostnames. > > > > Can you attach a 'ceph osd crush tree' (or partial output) so I can see > > what you mean? > > Sure - attached. Got it > >> Now the quesions are: > >> 1.) can we remove the tree? How? > >> 2.) Can we do this now or only after all clients are running Luminous? > >> 3.) is it enought to enable the mgr balancer module? First, ceph osd crush weight-set create-compat then for each osd, ceph osd crush weight-set reweight-compat <osd> <optimized-weight> ceph osd crush reweight <osd> <target-weight> That won't move any data but will keep your current optimized weights in the compat weight-set where they belong. Then you can remove the *-target-weight buckets. For each osd, ceph osd crush rm <osd> <ancestor>-target-weight and then for each remaining bucket ceph osd crush rm <foo>-target-weight Finally, turn on the balancer (or test it to see what it it wants to do with the optimize command.) HTH! sage -- 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
