Hi Tim, > Message: 5 > Date: Sun, 2 Feb 2014 09:56:44 +0000 > From: Tim Bell <Tim.Bell at cern.ch> > To: "openstack-operators at lists.openstack.org" > <openstack-operators at lists.openstack.org> > Subject: [Openstack-operators] Limiting IOPS on a specific VM > Message-ID: > <5D7F9996EA547448BC6C54C8C5AAF4E5D99B0D41 at CERNXCHG42.cern.ch> > Content-Type: text/plain; charset="us-ascii" > > > With https://wiki.openstack.org/wiki/InstanceResourceQuota, it is possible to define the maximum disk read rate such as > > nova flavor-key m1.small set quota:disk_read_bytes_sec=10240000 > > Is there a way to do the same thing for one VM rather than for a flavor ? If a hypervisor is encountering a high I/O load, we would like to be able to throttle back the IOPS from some of the VMs temporarily. Couldn't you just directly twiddle the relevant cgroups knobs for the problem instance/s? Perhaps you are looking for a Nova integrated approach though... I don't think anything exists yet. Out of curiosity, how are you detecting this in the first place? -- Cheers, ~Blairo -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-operators/attachments/20140202/72b1a2cf/attachment.html>