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From Mike Tutkowski <mike.tutkow...@solidfire.com>
Subject Re: CloudStack Storage Question
Date Thu, 10 Jan 2013 22:58:13 GMT
Thanks, Edison!

That's very helpful info.


On Thu, Jan 10, 2013 at 3:49 PM, Edison Su <Edison.su@citrix.com> wrote:

>
>
> > -----Original Message-----
> > From: Mike Tutkowski [mailto:mike.tutkowski@solidfire.com]
> > Sent: Thursday, January 10, 2013 2:22 PM
> > To: cloudstack-dev@incubator.apache.org
> > Subject: CloudStack Storage Question
> >
> > Hi everyone,
> >
> > I'm new to CloudStack and am trying to understand how it works with
> > regards to storage exposed to hypervisors.
> >
> > For example:
> >
> > My company, SolidFire, has a feature that exists at the virtual-volume
> (for us,
> > equivalent to a LUN) layer:  Hard Quality of Service.  So, for each
> volume in
> > one of our clusters, you can specify a minimum and maximum number of
> > IOPS (beneficial to Cloud Service Providers who want to write hard SLAs
> > around performance).
> >
> > We have a potential customer who is using CloudStack currently with
> another
> > vendor (via NFS shares).  They asked me today how a hypervisor run under
> > CloudStack would see the iSCSI storage exposed to them in one of our
> > volumes.  More specifically, can the hypervisor see a volume per VM or
> is the
> > hypervisor forced to create all of its VMs off of the same volume?  If
> the
> > hypervisor is forced to create all of its VMs off of the same volume,
> then this
> > would significantly reduce the value of our hard quality of service
> offering
> > since all of these VMs would have to run at the same performance SLA.
>
>
> It depends on hypervisor, for KVM, per VM per LUN will work, xenserver
> doesn't work. For Vmware, it will work, but with a limitation(one ESXi host
> can only have 256 LUN at max).
>
> >
> > Can anyone help me better understand how this would work?
> >
> > Thanks so much!!
> >
> > --
> > *Mike Tutkowski*
> > *Senior CloudStack Developer, SolidFire Inc.*
> > e: mike.tutkowski@solidfire.com
> > o: 303.746.7302
> > Advancing the way the world uses the
> > cloud<http://solidfire.com/solution/overview/?video=play>
> > *(tm)*
>



-- 
*Mike Tutkowski*
*Senior CloudStack Developer, SolidFire Inc.*
e: mike.tutkowski@solidfire.com
o: 303.746.7302
Advancing the way the world uses the
cloud<http://solidfire.com/solution/overview/?video=play>
*™*

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