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From Geoff Higginbottom <geoff.higginbot...@shapeblue.com>
Subject RE: Primary Storage - Maximum capacity
Date Thu, 14 Mar 2013 12:27:19 GMT
Gaspare

The limits are really related to a single Primary Storage Volume, and as you can have multiple
volumes within a Cluster, and multiple Clusters within a Zone, there are effectively no limits
on how much storage a Zone can have.

In fact we always recommend at least two Primary Storage Volumes per Cluster, ideally provided
by different Hardware, for maximum resiliency.

Regards

Geoff Higginbottom

D: +44 20 3603 0542 | S: +44 20 3603 0540 | M: +447968161581

geoff.higginbottom@shapeblue.com

-----Original Message-----
From: Gaspare A Silvestri [mailto:g.silvestri@netsons.com]
Sent: 14 March 2013 10:21
To: cloudstack-users@incubator.apache.org
Subject: Re: Primary Storage - Maximum capacity

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?

Thanks,

Gaspare

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 paul.angus@shapeblue.com
>
> -----Original Message-----
> From: Kirk Jantzer [mailto:kirk.jantzer@gmail.com]
> 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 < g.silvestri@netsons.com>
wrote:
>
>> 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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<http://it.linkedin.com/in/gasilvestri>
This email and any attachments to it may be confidential and are intended solely for the use
of the individual to whom it is addressed. Any views or opinions expressed are solely those
of the author and do not necessarily represent those of Shape Blue Ltd or related companies.
If you are not the intended recipient of this email, you must neither take any action based
upon its contents, nor copy or show it to anyone. Please contact the sender if you believe
you have received this email in error. Shape Blue Ltd is a company incorporated in England
& Wales. ShapeBlue Services India LLP is operated under license from Shape Blue Ltd. ShapeBlue
is a registered trademark.


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