Re: IO rate-limiting with Ceph RBD (and libvirt)

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On 03/21/2018 06:48 PM, Andre Goree wrote:
> I'm trying to determine the best way to go about configuring IO
> rate-limiting for individual images within an RBD pool.
> 
> Here [1], I've found that OpenStack appears to use Libvirt's "iotune"
> parameter, however I seem to recall reading about being able to do so
> via Ceph's settings.
> 
> Is there a place in Ceph to set IO limits on individual images within an
> RBD pool?  Thanks in advance for the advice.

No, there is not. Right now you will need to limit this through
libvirt/Qemu indeed.

People are thinking about a QoS mechanism inside the OSDs, but that's
not there yet, so don't count on it.

Wido

> 
> [1] https://ceph.com/geen-categorie/openstack-ceph-rbd-and-qos/
> 
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