Hi Victor,
that's true for Ceph releases prior to Octopus. The latter has some
improvements in this area..
There is pending backport PR to fix that in Nautilus as well:
https://github.com/ceph/ceph/pull/33889
AFAIR this topic has been discussed in this mailing list multiple times.
Thanks,
Igor
On 3/27/2020 10:56 PM, victorhooi@xxxxxxxxx wrote:
Hi,
I'm using Intel Optane disks to provide WAL/DB capacity for my Ceph cluster (which is part of Proxmox - for VM hosting).
I've read that WAL/DB partitions only use either 3GB, or 30GB, or 300GB - due to the way that RocksDB works.
Is this true?
My current partition for WAL/DB is 145 GB - does this mean that 115Gb of that will be permanently wasted?
Is this behaviour documented somewhere, or is there some background, so I can understand a bit more about how it works?
Thanks,
Victor
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