adding block.db to OSD

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Hello,

is there anything else needed beside running:
ceph-bluestore-tool --path /var/lib/ceph/osd/ceph-${OSD} bluefs-bdev-new-db --dev-target /dev/vgroup/lvdb-1

I did so some weeks ago and currently i'm seeing that all osds originally deployed with --block-db show 10-20% I/O waits while all those got converted using ceph-bluestore-tool show 80-100% I/O waits.

Also is there some tuning available to use more of the SSD? The SSD (block-db) is only saturated at 0-2%.

Greets,
Stefan
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