I tried setting the weight set for the 'new' OSDs as you suggested. What looks strange to me is that it was enough to set it for a single OSD to have the weight-set defined for all the OSDs. I defined the weight set for osd.12, and it got defined also for osd.13..19 ... [*]
At any rate after this change I am now able to create a balancer compat plan and have it executed Thanks again for your help !! Cheers, Massimo [*] [root@c-mon-01 /]# ceph osd crush tree ID CLASS WEIGHT (compat) TYPE NAME -1 1.95190 root default -2 0 0 rack Rack15-PianoAlto -3 0.39038 0.38974 host c-osd-1 0 hdd 0.09760 0.09988 osd.0 1 hdd 0.09760 0.10040 osd.1 2 hdd 0.09760 0.08945 osd.2 3 hdd 0.09760 0.10001 osd.3 -4 0.39038 0.39076 host c-osd-2 4 hdd 0.09760 0.10275 osd.4 5 hdd 0.09760 0.10081 osd.5 6 hdd 0.09760 0.10135 osd.6 7 hdd 0.09760 0.08585 osd.7 -5 0.39038 0.39055 host c-osd-3 8 hdd 0.09760 0.10622 osd.8 9 hdd 0.09760 0.09148 osd.9 10 hdd 0.09760 0.10164 osd.10 11 hdd 0.09760 0.09122 osd.11 -11 0.78076 0.78076 host c-osd-5 12 hdd 0.09760 osd.12 13 hdd 0.09760 osd.13 14 hdd 0.09760 osd.14 15 hdd 0.09760 osd.15 16 hdd 0.09760 osd.16 17 hdd 0.09760 osd.17 18 hdd 0.09760 osd.18 19 hdd 0.09760 osd.19 [root@c-mon-01 /]# ceph osd crush weight-set reweight-compat osd.12 0.09760 [root@c-mon-01 /]# ceph osd crush tree ID CLASS WEIGHT (compat) TYPE NAME -1 1.95190 root default -2 0 0 rack Rack15-PianoAlto -3 0.39038 0.38974 host c-osd-1 0 hdd 0.09760 0.09988 osd.0 1 hdd 0.09760 0.10040 osd.1 2 hdd 0.09760 0.08945 osd.2 3 hdd 0.09760 0.10001 osd.3 -4 0.39038 0.39076 host c-osd-2 4 hdd 0.09760 0.10275 osd.4 5 hdd 0.09760 0.10081 osd.5 6 hdd 0.09760 0.10135 osd.6 7 hdd 0.09760 0.08585 osd.7 -5 0.39038 0.39055 host c-osd-3 8 hdd 0.09760 0.10622 osd.8 9 hdd 0.09760 0.09148 osd.9 10 hdd 0.09760 0.10164 osd.10 11 hdd 0.09760 0.09122 osd.11 -11 0.78076 0.78076 host c-osd-5 12 hdd 0.09760 0.09760 osd.12 13 hdd 0.09760 0.09760 osd.13 14 hdd 0.09760 0.09760 osd.14 15 hdd 0.09760 0.09760 osd.15 16 hdd 0.09760 0.09760 osd.16 17 hdd 0.09760 0.09760 osd.17 18 hdd 0.09760 0.09760 osd.18 19 hdd 0.09760 0.09760 osd.19 [root@c-mon-01 /]# On Thu, Mar 14, 2019 at 8:16 AM Konstantin Shalygin <[email protected]> wrote: > On 3/14/19 2:15 PM, Massimo Sgaravatto wrote: > > I have some clients running centos7.4 with kernel 3.10 > > > > I was told that the minimum requirements are kernel >=4.13 or CentOS > > >= 7.5. > > Yes, this is correct. > > > > k > >
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