Hi,

we're playing around with ceph but are not quite happy with the IOs.
on average 5000 iops / write
on average 13000 iops / read

We're expecting more. :( any ideas or is that all we can expect?

With server SSD you can expect up to ~10000 write / ~25000 read iops per a single client.

https://yourcmc.ru/wiki/Ceph_performance

money is NOT a problem for this test-bed, any ideas howto gain more
IOS is greatly appreciated.

Grab some server NVMes and best possible CPUs :)
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