Hello,
I am running ceph nautilus 14.2.8
I had to remove 2 pools (old cephfs data and metadata pool with 1024 pgs).
The removal of the pools seems to take a incredible time to free the
space (the data pool I deleted was more than 100 TB and in 36h I got
back only 10TB). In the meantime, the cluster is extremely slow (a rbd
extract takes ~1h30 mn for a 32 GB image and writing 10MB in cephfs
takes half a minute !!) which makes the cluster almost unusable.
It seems that the removal of deleted pg is done by deep-scrubs according
tohttps://medium.com/opsops/a-very-slow-pool-removal-7089e4ac8301
Also it has been reported that this could be a regression in
nautilushttps://lists.ceph.io/hyperkitty/list/ceph-users@xxxxxxx/thread/W4M5XQRDBLXFGJGDYZALG6TQ4QBVGGAJ/#W4M5XQRDBLXFGJGDYZALG6TQ4QBVGGAJ
But I couldn't find a fix or a way to speedup (or slow down) the process
and get back the cluster to a decent reactivity.
Is there a way ?
Thanks
F.
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