Hello all! We have a cluster where there are HDDs for data and NVMEs for journals and indexes. We recently added pure SSD hosts, and created a storage class SSD. To do this, we create a default.rgw.hot.data pool, associate a crush rule using SSD and create a HOT storage class in the placement-target. The problem is when we send an object to use a HOT storage class, it is in both the STANDARD storage class pool and the HOT pool. STANDARD pool: # rados -p default.rgw.buckets.data ls d86dade5-d401-427b-870a-0670ec3ecb65.385198.4_LICENSE # rados -p default.rgw.buckets.data stat d86dade5-d401-427b-870a-0670ec3ecb65.385198.4_LICENSE default.rgw.buckets.data/d86dade5-d401-427b-870a-0670ec3ecb65.385198.4_LICENSE mtime 2021-02-09 14: 54: 14.000000, size 0 HOT pool: # rados -p default.rgw.hot.data ls d86dade5-d401-427b-870a-0670ec3ecb65.385198.4__shadow_.rmpla1NTgArcUQdSLpW4qEgTDlbhn9f_0 # rados -p default.rgw.hot.data stat d86dade5-d401-427b-870a-0670ec3ecb65.385198.4__shadow_.rmpla1NTgArcUQdSLpW4qEgTDlbhn9f_0 default.rgw.hot.data/d86dade5-d401-427b-870a-0670ec3ecb65.385198.4__shadow_.rmpla1NTgArcUQdSLpW4qEgTDlbhn9f_0 mtime 2021-02-09 14: 54: 14.000000, size 15220 The object itself is in the HOT pool, however it creates this other object similar to an index in the STANDARD pool. Monitoring with iostat we noticed that this behavior generates an unnecessary IO on disks that do not need to be touched. Why this behavior? Are there any ways around it? Thanks, Marcelo _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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