CONF.libvirt.images_default_iops_second isn't in upstream yet, anyway I
think this is definitely a bug and we should support set rate limit for rbd
disk backend.
I filed a bug here to track this issue.
https://bugs.launchpad.net/nova/+bug/1362129
On Wed, Aug 27, 2014 at 7:05 PM, Haomai Wang <haomaiw...@gmail.com> wrote:
> 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 <k...@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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> > Post to : openstack@lists.openstack.org
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> >
>
>
>
> --
> Best Regards,
>
> Wheat
>
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>
--
Tang Yaguang
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