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From Gaspare A Silvestri <>
Subject Re: Primary Storage - Maximum capacity
Date Thu, 14 Mar 2013 10:20:31 GMT
Thank you everybody for your answers.

Excluding any consideration about the global capacities (for which I 
also thank you), I can understand that you have confirmed that I will be 
able to use more than 8TB of storage for  every zone. Is this correct?



On 14/03/2013 08:48, Paul Angus wrote:
> Hi,
> There's a nominal recommended limit of (as I recall) 8TB per primary storage pool.  But
this is a finger in the air guess-timate.
> The limit is really down to your infrastructure.
> When we talk about the number of VMs a host can support we're looking at not only the
host's CPU and memory resources but also its connectivity to both the network in general and
also to its storage. So if we were to say we think a host can support 20 VMs it includes factoring
in the speed of the link to the storage and the speed of that storage.
> So, if you have 8 hosts in a cluster and each host can support 20 VMs and each VM has
a 50GB disk then
> 8 x 20 x 50 = 8TB (per cluster)
> So there wouldn't be much point in having a 30TB pool for that cluster UNLESS you need
that many disks to get the number of IOPS you need (but then you'd look at the size of the
individual disks you're using).
> For the above example a 12TB pool would give you wiggle room in case the size or number
of VMS ends up more than you thought it would be....
> Regards,
> Paul Angus
> S: +44 20 3603 0540 | M: +447711418784
> -----Original Message-----
> From: Kirk Jantzer []
> Sent: 13 March 2013 13:56
> To: Cloudstack users mailing list
> Subject: Re: Primary Storage - Maximum capacity
> I'm using local storage, and my single zone has a cluster of 7 servers with a total of
~45TB; so I think you'll be fine, but will defer to the experts on this one.
> On Wed, Mar 13, 2013 at 3:28 AM, Gaspare A Silvestri <>
>> Hello everybody,
>> is there a limit (in size) for the global TB of usable primary storage
>> in a single CloudStack zone? We are considering to implement a SAN
>> with at least 12TB of space.
>> My current configuration is VMware vSphere 5 + cloudStack 4.0.1 .
>> Thanks in advance,
>> Gaspare
> --
> Regards,
> Kirk Jantzer
> c: (678) 561-5475
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