Re: Equivalent of vmware SIOC (Storage IO Control) in KVM

[Paolo Bonzini <pbonzini@redhat.com>]

Il 12/10/2013 08:09, Soumendu Satapathy (sosatapa) ha scritto:
> Do we have an equivalent of vmware SIOC like feature in KVM?

Yes, you have two choices:

1) use cgroups to throttle I/O at the level of the host disk (i.e.
multiple virtual disks stored on the same disk share the limit).  If
you're using libvirt, add the <blkiotune> element to the definition of
the virtual machine.

2) enable I/O throttling in QEMU, to apply limits at the level of the
guest disk.  If you're using libvirt, add the "iotune" element within
the <disk> element in the definition of the virtual machine.

Both are documented at http://libvirt.org/formatdomain.html (search for
blkiotune and iotune).

Paolo