Faster than fuse-rbd, not qemu.
Main issue is kernel pagecache and client upgrades, for example cluster with 
700 osd and 1000 clients we need update client version for new features. With 
current oVirt realization we need update kernel then reboot host. With librbd 
we just need update package and activate host.


k

Sent from my iPhone

> On 18 Jan 2021, at 19:13, Shantur Rathore <rathor...@gmail.com> wrote:
> 
> Thanks for pointing that out to me Konstantin.
> 
> I understand that it would use a kernel client instead of userland rbd lib.
> Isn't it better as I have seen kernel clients 20x faster than userland??
> 
> I am probably missing something important here, would you mind detailing that.
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