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From Wido den Hollander <>
Subject Re: Change Volume IOPS on fly without detaching the disk feature.
Date Wed, 05 Mar 2014 10:12:52 GMT

On 03/05/2014 10:12 AM, Wei ZHOU wrote:
> I was thinking about it last week.
> AFAIK, libvirt-java 0.5.1 does not support change setting on running vms,
> but virsh command line and libvirt API supports it.
> so the sulution are
> (1) change libvirt-java to support it, and make it released in the next
> version. Maybe Wido can help us.

Sure! That seems the best way forward. What is currently lacking in the 
libvirt-java bindings?

> (2) call virsh command line.

Please, please, do not do that. That's very hacky. We should really keep 
using the libvirt-java bindings and stay away from invoking binaries.


> -Wei
> 2014-03-05 9:01 GMT+01:00 Punith S <>:
>> hi guys,
>> we are having a fixed max iops for each volume being attached to the
>> instance in managed storage,
>> so this a problem where we are making users to pre allocate the iops of the
>> disk without having an option to change or resize it, similar to the size
>> metric.
>> so i would like to introduce a new feature which enables to change or
>> resize the volume iops on fly without detaching the datadisk of the VM with
>> zero downtime where performance of the datadisk can be altered at any point
>> with the available iops of the primary storage pool, which is similar in
>> resizing the volume or datadisk of the vm , where in latter we have to
>> detach the datadisk.
>> what do you guys think about this feature ? any feedback ?
>> thanks,
>> --
>> regards,
>> punith s

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