Open Stack

Yes, it's possible just like a volume from Cinder. But it still exists
some works todo. We need to pass iops/bw throttle value in via config
or flavor metadata. If you want to get it as quick as possible, you
can add some hack codes like this:

        tune_items = ['disk_read_bytes_sec', 'disk_read_iops_sec',
            'disk_write_bytes_sec', 'disk_write_iops_sec',
            'disk_total_bytes_sec', 'disk_total_iops_sec']
        # Note(yaguang): Currently, the only tuning available is Block I/O
        # throttling for qemu.
        if self.source_type in ['file', 'block']:
            for key, value in extra_specs.iteritems():
                scope = key.split(':')
                if len(scope) > 1 and scope[0] == 'quota':
                    if scope[1] in tune_items:
                        setattr(info, scope[1], value)
+        if not getattr(info, 'disk_total_bytes_sec'):
+            setattr(info, 'disk_total_bytes_sec',
CONF.libvirt.images_default_bw_second)
+        if not getattr(info, 'disk_total_iops_sec'):
+            setattr(info, 'disk_total_iops_sec',
CONF.libvirt.images_default_iops_second)
        return info

On Wed, Aug 27, 2014 at 4:32 PM, Tyler Wilson <kupo at linuxdigital.net> wrote:
> Hey All,
>
> Is it possible to setup a iops/bytesps limitation within nova using libvirt
> methods? I've found the following links but cant get it to work with my
> environment;
>
> http://ceph.com/planet/openstack-ceph-rbd-and-qos/
> https://wiki.openstack.org/wiki/InstanceResourceQuota
>
> I see in the commit code that it specifically mentions file and block with
> no network in the code;
>
>         tune_items = ['disk_read_bytes_sec', 'disk_read_iops_sec',
>             'disk_write_bytes_sec', 'disk_write_iops_sec',
>             'disk_total_bytes_sec', 'disk_total_iops_sec']
>         # Note(yaguang): Currently, the only tuning available is Block I/O
>         # throttling for qemu.
>         if self.source_type in ['file', 'block']:
>             for key, value in extra_specs.iteritems():
>                 scope = key.split(':')
>                 if len(scope) > 1 and scope[0] == 'quota':
>                     if scope[1] in tune_items:
>                         setattr(info, scope[1], value)
>         return info
>
> Is it possible to limit or establish QoS rules for network storage in nova
> currently or only in cinder? My source protocol is rbd, qemu driver and raw
> disk type.
>
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-- 
Best Regards,

Wheat