On 3/10/2022 6:10 PM, Sasa Glumac wrote:
> In this respect could you please try to switch bluestore and bluefs
> allocators to bitmap and run some smoke benchmarking again.
Can i change this on live server (is there possibility of losing data
etc )? Can you please share correct procedure.
To change the allocator for an OSD.N one should run:
ceph config set osd.N bluestore_allocator bitmap
and restart an OSD.
I'm unware about any issues with such a switch...
Alternatively/additionally you might want to try stupid allocator as well.
> Additionally you might want to upgrade to 15.2.16 which includes a bunch
> of improvements for Avl/Hybrid allocators tail latency numbers as per
> the ticket above.
Atm we use pve repository where 15.2.15 is latest , I will need to
either wait for .16 from them or create second cluster without proxmox
but would like to test on existing.
Is there any difference between pve ceph and regular so i can change
repo and install over existing ?
Sorry I don't know.
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Igor Fedotov
Ceph Lead Developer
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