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​Hi John,​


> Otherwise you can move to multibackend but you will need to update the
> hosts column on your existing volumes.


For above statement, did you mean a unique backend on separate volume nodes
?

Will there be any issues, if the enabled_backends are used with each
backend tied to particular volume type. Now this configuration is repeated
for all volume nodes. Do we need to be concerned about the host entry ?


Regards,
Amit
*CloudByte Inc.* <http://www.cloudbyte.com/>

On Mon, Jan 19, 2015 at 4:14 AM, John Griffith <john.griffith at solidfire.com>
wrote:

>
> On Jan 16, 2015 9:03 PM, "mad Engineer" <themadengin33r at gmail.com> wrote:
> >
> > Hello All,
> >               i am working on integrating VNX with cinder,i have plan
> > to add another NFS storage in the future,without removing VNX.
> >
> > Can i add another backend while first backend is running without
> > causing problem to running volumes.
> > I heard that multiple backend is supported,
> >
> > thanks for any help
> >
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>
> So as long as you used the "enabled backend" format in your existing
> config you "should" be able to just add another backend without impacting
> your existing setup (I've never tried this with NFS/VNX myself though).
>
> If you're not using the enabled backends directive you can deploy a new
> cinder - volume node and just add your new driver that way.
>
> Otherwise you can move to multibackend but you will need to update the
> hosts column on your existing volumes.
>
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