RBD tuning for virtualization (all flash)

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Hello.

We're running 1000vm on 28 node with 6 ssd (no seperate db device) and
these vms are Mostly win10.

2 lvm osd Per 4tb device total 288osd and one RBD pool with 8192 PG.
Replication 3.

Ceph version : nautilus 14.2.16

I'm looking for all flash RBD tuning.
This is good test env and tomorrow gonna be prod. In vms I see 1800mb/s
read and 900mb/s write (qemu = write back)
With good tuning I believe this cluster will go further.
 Do you have any special suggestion?

Have a nice weekend.
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