On 2020-09-15 02:09, Nathan Fish wrote: > What about hardlinks, are there any of those? Are there lots of > directories or tiny (<4k) files? The default allocation size of bluestore depends on the disk type. We have this in our config: # 4096 B instead of 16K (SSD) / 64K (HDD) to avoid large overhead for # small (cephfs) files bluestore_min_alloc_size_ssd = 4096 bluestore_min_alloc_size_hdd = 4096 If you have a lot of small files they will consume way more space on CephFS with the default alloc size for realeases older than Octopus and or using hdd drives. The bad news: you cannot change that after the fact. You have to reprovision your OSDs with a smaller alloc size if you want to change that. On the upside: you can use default Ceph recovery mechanism to do that without downtime. > Also, size=2 is not very safe. You want size=3, min_size=2 if you are > doing replication. ^^ This, really! Gr. Stefan _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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