One consideration is that you may not be able to fit higher DB levels on
the db partition and end up with a lot of waste (Nick Fisk recently saw
this on his test cluster). We've talked about potentially trying to
pre-compute the hierarchy sizing so that we can align a level boundary
to fit
Looks like you’ve considered the essential points for bluestore OSDs, yep.
:)
My concern would just be the surprisingly-large block.db requirements for
rgw workloads that have been brought up. (300+GB per OSD, I think someone
saw/worked out?).
-Greg
On Tue, Nov 20, 2018 at 1:35 AM Dan van der
Hi ceph-users,
Most of our servers have 24 hdds plus 4 ssds.
Any experience how these should be configured to get the best rgw performance?
We have two options:
1) All osds the same, with data on the hdd and block.db on a 40GB
ssd partition
2) Two osd device types: hdd-only for the rgw
