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Thanks for the reply! – it ended being that the HDD pool in this server is larger than the other servers. This increases the server’s weight and therefore the SSD pool in this server
is affected. I will add more SSDs to this server to keep the ratio of HDDs to SSDs the same across all hosts. Kind regards, Glen Baars From: Linh Vu <vul@xxxxxxxxxxxxxx>
Something funny going on with your new disks: 138 ssd 0.90970 1.00000 931G 820G 111G 88.08 2.71 216 Added 139 ssd 0.90970 1.00000 931G 771G 159G 82.85 2.55 207 Added 140 ssd 0.90970 1.00000 931G 709G 222G 76.12 2.34 197 Added 141 ssd 0.90970 1.00000 931G 664G 267G 71.31 2.19 184 Added The last 3 columns are: % used, variation, and PG count. These 4 have much higher %used and PG count than the rest, almost double. You probably have these disks in multiple pools and therefore have too many PGs
on them. One of them is at 88% used. The max available capacity of a pool is calculated based on the most full OSD in it, which is why your total available capacity drops to 0.6TB. From: ceph-users <ceph-users-bounces@xxxxxxxxxxxxxx> on behalf of Glen Baars <glen@xxxxxxxxxxxxxxxxxxxxxx> Hello Ceph Users, We have added more ssd storage to our ceph cluster last night. We added 4 x 1TB drives and the available space went from 1.6TB to 0.6TB ( in `ceph df` for the SSD pool ). I would assume that the weight needs to be changed but I didn’t think I would need to? Should I change them to 0.75 from 0.9 and hopefully it will rebalance correctly? #ceph osd tree | grep -v hdd ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF -1 534.60309 root default -19 62.90637 host NAS-AUBUN-RK2-CEPH06 115 ssd 0.43660 osd.115 up 1.00000 1.00000 116 ssd 0.43660 osd.116 up 1.00000 1.00000 117 ssd 0.43660 osd.117 up 1.00000 1.00000 118 ssd 0.43660 osd.118 up 1.00000 1.00000 -22 105.51169 host NAS-AUBUN-RK2-CEPH07 138 ssd 0.90970 osd.138 up 1.00000 1.00000 Added 139 ssd 0.90970 osd.139 up 1.00000 1.00000 Added -25 105.51169 host NAS-AUBUN-RK2-CEPH08 140 ssd 0.90970 osd.140 up 1.00000 1.00000 Added 141 ssd 0.90970 osd.141 up 1.00000 1.00000 Added -3 56.32617 host NAS-AUBUN-RK3-CEPH01 60 ssd 0.43660 osd.60 up 1.00000 1.00000 61 ssd 0.43660 osd.61 up 1.00000 1.00000 62 ssd 0.43660 osd.62 up 1.00000 1.00000 63 ssd 0.43660 osd.63 up 1.00000 1.00000 -5 56.32617 host NAS-AUBUN-RK3-CEPH02 64 ssd 0.43660 osd.64 up 1.00000 1.00000 65 ssd 0.43660 osd.65 up 1.00000 1.00000 66 ssd 0.43660 osd.66 up 1.00000 1.00000 67 ssd 0.43660 osd.67 up 1.00000 1.00000 -7 56.32617 host NAS-AUBUN-RK3-CEPH03 68 ssd 0.43660 osd.68 up 1.00000 1.00000 69 ssd 0.43660 osd.69 up 1.00000 1.00000 70 ssd 0.43660 osd.70 up 1.00000 1.00000 71 ssd 0.43660 osd.71 up 1.00000 1.00000 -13 45.84741 host NAS-AUBUN-RK3-CEPH04 72 ssd 0.54579 osd.72 up 1.00000 1.00000 73 ssd 0.54579 osd.73 up 1.00000 1.00000 76 ssd 0.54579 osd.76 up 1.00000 1.00000 77 ssd 0.54579 osd.77 up 1.00000 1.00000 -16 45.84741 host NAS-AUBUN-RK3-CEPH05 74 ssd 0.54579 osd.74 up 1.00000 1.00000 75 ssd 0.54579 osd.75 up 1.00000 1.00000 78 ssd 0.54579 osd.78 up 1.00000 1.00000 79 ssd 0.54579 osd.79 up 1.00000 1.00000 # ceph osd df | grep -v hdd ID CLASS WEIGHT REWEIGHT SIZE USE AVAIL %USE VAR PGS 115 ssd 0.43660 1.00000 447G 250G 196G 56.00 1.72 103 116 ssd 0.43660 1.00000 447G 191G 255G 42.89 1.32 84 117 ssd 0.43660 1.00000 447G 213G 233G 47.79 1.47 92 118 ssd 0.43660 1.00000 447G 208G 238G 46.61 1.43 85 138 ssd 0.90970 1.00000 931G 820G 111G 88.08 2.71 216 Added 139 ssd 0.90970 1.00000 931G 771G 159G 82.85 2.55 207 Added 140 ssd 0.90970 1.00000 931G 709G 222G 76.12 2.34 197 Added 141 ssd 0.90970 1.00000 931G 664G 267G 71.31 2.19 184 Added 60 ssd 0.43660 1.00000 447G 275G 171G 61.62 1.89 100 61 ssd 0.43660 1.00000 447G 237G 209G 53.04 1.63 90 62 ssd 0.43660 1.00000 447G 275G 171G 61.58 1.89 95 63 ssd 0.43660 1.00000 447G 260G 187G 58.15 1.79 97 64 ssd 0.43660 1.00000 447G 232G 214G 52.08 1.60 83 65 ssd 0.43660 1.00000 447G 207G 239G 46.36 1.42 75 66 ssd 0.43660 1.00000 447G 217G 230G 48.54 1.49 84 67 ssd 0.43660 1.00000 447G 252G 195G 56.36 1.73 92 68 ssd 0.43660 1.00000 447G 248G 198G 55.56 1.71 94 69 ssd 0.43660 1.00000 447G 229G 217G 51.25 1.57 84 70 ssd 0.43660 1.00000 447G 259G 187G 58.01 1.78 87 71 ssd 0.43660 1.00000 447G 267G 179G 59.83 1.84 97 72 ssd 0.54579 1.00000 558G 217G 341G 38.96 1.20 100 73 ssd 0.54579 1.00000 558G 283G 275G 50.75 1.56 121 76 ssd 0.54579 1.00000 558G 286G 272G 51.33 1.58 129 77 ssd 0.54579 1.00000 558G 246G 312G 44.07 1.35 104 74 ssd 0.54579 1.00000 558G 273G 285G 48.91 1.50 122 75 ssd 0.54579 1.00000 558G 281G 276G 50.45 1.55 114 78 ssd 0.54579 1.00000 558G 289G 269G 51.80 1.59 133 79 ssd 0.54579 1.00000 558G 276G 282G 49.39 1.52 119 Kind regards, Glen Baars BackOnline Manager
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