Hi Georg, I am having a similar issue with the RGW pool. However, not to the extent of 10x error rate. In my case, the error rate is a bout 2-3x. My real data usage is around 6TB, but Ceph uses over 17TB. I have asked this question here, but no one seems to know the solution and how to go about finding the wasted space and clearing it.
@ceph_guys - does anyone in the company work in the area of finding the bugs that relate to the wasted space? Anyone could assist us in debugging the fixing our issues? Thanks Andrei ----- Original Message ----- > From: "Georg F" <ge...@pace.car> > To: ceph-users@ceph.io > Sent: Thursday, 26 September, 2019 10:50:01 > Subject: [ceph-users] Raw use 10 times higher than data use > Hi all, > > I've recently moved a 1TiB pool (3TiB raw use) from hdd osds (7) to newly > added > nvme osds (14). The hdd osds should be almost empty by now as just small pools > reside on them. The pools on the hdd osds in sum store about 25GiB, which > should use about 75GiB with a pool size of 3. Wal and db are on separate > devices. > > However the outputs of ceph df and ceph osd df tell a different story: > > # ceph df > RAW STORAGE: > CLASS SIZE AVAIL USED RAW USED %RAW USED > hdd 19 TiB 18 TiB 775 GiB 782 GiB 3.98 > > # ceph osd df | egrep "(ID|hdd)" > ID CLASS WEIGHT REWEIGHT SIZE RAW USE DATA OMAP META AVAIL > %USE > VAR PGS STATUS > 8 hdd 2.72392 1.00000 2.8 TiB 111 GiB 10 GiB 111 KiB 1024 MiB 2.7 TiB 3.85 > 0.60 65 up > 6 hdd 2.17914 1.00000 2.3 TiB 112 GiB 11 GiB 83 KiB 1024 MiB 2.2 TiB 4.82 > 0.75 58 up > 3 hdd 2.72392 1.00000 2.8 TiB 114 GiB 13 GiB 71 KiB 1024 MiB 2.7 TiB 3.94 > 0.62 76 up > 5 hdd 2.72392 1.00000 2.8 TiB 109 GiB 7.6 GiB 83 KiB 1024 MiB 2.7 TiB 3.76 > 0.59 63 up > 4 hdd 2.72392 1.00000 2.8 TiB 112 GiB 11 GiB 55 KiB 1024 MiB 2.7 TiB 3.87 > 0.60 59 up > 7 hdd 2.72392 1.00000 2.8 TiB 114 GiB 13 GiB 8 KiB 1024 MiB 2.7 TiB 3.93 > 0.61 66 up > 2 hdd 2.72392 1.00000 2.8 TiB 111 GiB 9.9 GiB 78 KiB 1024 MiB 2.7 TiB 3.84 > 0.60 69 up > > The sum of "DATA" is 75,5GiB which is what I am expecting to be used by the > pools. How come the sum of "RAW USE" is 783GiB? More than 10x the size of the > stored data. On my nvme osds the "RAW USE" to "DATA" overhead is <1%: > > ceph osd df|egrep "(ID|nvme)" > ID CLASS WEIGHT REWEIGHT SIZE RAW USE DATA OMAP META AVAIL > %USE > VAR PGS STATUS > 0 nvme 2.61989 1.00000 2.6 TiB 181 GiB 180 GiB 31 KiB 1.0 GiB 2.4 TiB 6.74 > 1.05 12 up > 1 nvme 2.61989 1.00000 2.6 TiB 151 GiB 150 GiB 39 KiB 1024 MiB 2.5 TiB 5.62 > 0.88 10 up > 13 nvme 2.61989 1.00000 2.6 TiB 239 GiB 238 GiB 55 KiB 1.0 GiB 2.4 TiB > 8.89 > 1.39 16 up > -- truncated -- > > I am running ceph version 14.2.3 (0f776cf838a1ae3130b2b73dc26be9c95c6ccc39) > nautilus (stable) which was upgraded recently from 13.2.1. > > Any help is appreciated. > > Best regards, > Georg > _______________________________________________ > ceph-users mailing list -- ceph-users@ceph.io > To unsubscribe send an email to ceph-users-le...@ceph.io _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
