On 11/22/18 12:22 PM, Jarek wrote: > On Thu, 22 Nov 2018 12:05:12 +0100 > Marco Gaiarin <gaio@xxxxxxxxx> wrote: > >> Mandi! Paweł Sadowsk >> In chel di` si favelave... >> >>> We did similar changes a many times and it always behave as >>> expected. >> >> Ok. Good. >> >>> Can you show you crushmap/ceph osd tree? >> >> Sure! >> >> root@blackpanther:~# ceph osd tree >> ID WEIGHT TYPE NAME UP/DOWN REWEIGHT >> PRIMARY-AFFINITY -1 21.83984 root >> default -2 5.45996 host >> capitanamerica 0 1.81999 osd.0 up >> 1.00000 1.00000 1 1.81999 osd.1 up >> 1.00000 1.00000 10 0.90999 osd.10 up >> 1.00000 1.00000 11 0.90999 osd.11 up >> 1.00000 1.00000 -3 5.45996 host >> vedovanera 2 1.81999 osd.2 up >> 1.00000 1.00000 3 1.81999 osd.3 up >> 1.00000 1.00000 4 0.90999 osd.4 up >> 1.00000 1.00000 5 0.90999 osd.5 up >> 1.00000 1.00000 -4 5.45996 host >> deadpool 6 1.81999 osd.6 up 1.00000 >> 1.00000 7 1.81999 osd.7 up 1.00000 >> 1.00000 8 0.90999 osd.8 up 1.00000 >> 1.00000 9 0.90999 osd.9 up 1.00000 >> 1.00000 -5 5.45996 host >> blackpanther 12 1.81999 osd.12 up >> 0.04999 1.00000 13 1.81999 osd.13 up >> 0.04999 1.00000 14 0.90999 osd.14 up >> 0.04999 1.00000 15 0.90999 osd.15 up >> 0.04999 1.00000 >> >> OSD 12-15 are the new OSD; after creating it with 'noin' i've >> reweighted them to '0.05' (to make a test). >> >> >> Crush map attached. Thanks. > > When an osd is added, even with the noin flag, weight of the host is > changed, which trigers rebalance. > Instead of the noin flag, set 'osd crush initial weight = 0' in > ceph.conf. Exactly, your 'new' OSD have weight 1.81999 (osd.12, osd.13) and 0.90999 (osd.14, osd.15). As Jarek pointed out you should add them using 'osd crush initial weight = 0' and the use 'ceph osd crush reweight osd.x 0.05' to slowly increase weight on them. >From your osd tree it looks like you used 'ceph osd reweight'. -- PS _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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