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Posted to users@cloudstack.apache.org by Stephan Seitz <s....@secretresearchfacility.com> on 2016/09/09 13:24:22 UTC

two XenServer Pools on the same primary Storage?

Hi!

I've recently expanded our XenServer Pool and had to notice that E5-
2630 v2 are far different from E5-2630 v4. Due to Dell's R630 BIOS i'm
unable to use Intel FlexMigration. So I'ld loose the live-migration
feature.
Anyway. I'ld start introducing a new XenServer Pool (ACS Cluster) with
that newer CPU Generation.

My Question is: Is it possible to use the same (FC/presetup) Primary
Storages for both Clusters?
I've seen cluster.storage.operations.exclude (which defaults to false)
but currently don't know if this would need to be set to true on the
second cluster.

Would you expect any problems running two XenServer Pools (say: two ACS
Clusters) with the same Primary Storages?

Thanks for any advice!

cheers,

- Stephan

Re: two XenServer Pools on the same primary Storage?

Posted by Stephan Seitz <s....@secretresearchfacility.com>.
Hi Dag,

thank you for your feedback.We're going to introduce a new cluster. Not
really happy with that, but way better than risking any data loss.

- Stephan


Am Montag, den 12.09.2016, 08:24 +0000 schrieb Dag Sonstebo:
> Hi Stephan,
> 
> Zone-wide (i.e. multi-cluster) primary storage is only supported on
> KVM and VMware, not XenServer. 
> 
> Just so we are on the same page though – this applies at a LUN level
> – in other words two XenServer pools can never share a LUN, but they
> can both use different LUNs from the same storage backend.
> 
> And yes – to answer your question – using the same LUN on multiple
> clusters is pretty much guaranteed to cause you problems – most
> likely data corruption and complete loss of data. 
> 
> Regards,
> Dag Sonstebo
> Cloud Architect
> ShapeBlue
> 
> On 09/09/2016, 14:24, "Stephan Seitz" <s.seitz@secretresearchfacility
> .com> wrote:
> 
>     Hi!
>     
>     I've recently expanded our XenServer Pool and had to notice that
> E5-
>     2630 v2 are far different from E5-2630 v4. Due to Dell's R630
> BIOS i'm
>     unable to use Intel FlexMigration. So I'ld loose the live-
> migration
>     feature.
>     Anyway. I'ld start introducing a new XenServer Pool (ACS Cluster)
> with
>     that newer CPU Generation.
>     
>     My Question is: Is it possible to use the same (FC/presetup)
> Primary
>     Storages for both Clusters?
>     I've seen cluster.storage.operations.exclude (which defaults to
> false)
>     but currently don't know if this would need to be set to true on
> the
>     second cluster.
>     
>     Would you expect any problems running two XenServer Pools (say:
> two ACS
>     Clusters) with the same Primary Storages?
>     
>     Thanks for any advice!
>     
>     cheers,
>     
>     - Stephan
>     
>     
>     
> 
> 
> Dag.Sonstebo@shapeblue.com 
> www.shapeblue.com
> 53 Chandos Place, Covent Garden, London  WC2N 4HSUK
> @shapeblue
>   
>  
>

Re: two XenServer Pools on the same primary Storage?

Posted by Dag Sonstebo <Da...@shapeblue.com>.
Hi Stephan,

Zone-wide (i.e. multi-cluster) primary storage is only supported on KVM and VMware, not XenServer. 

Just so we are on the same page though – this applies at a LUN level – in other words two XenServer pools can never share a LUN, but they can both use different LUNs from the same storage backend.

And yes – to answer your question – using the same LUN on multiple clusters is pretty much guaranteed to cause you problems – most likely data corruption and complete loss of data. 

Regards,
Dag Sonstebo
Cloud Architect
ShapeBlue

On 09/09/2016, 14:24, "Stephan Seitz" <s....@secretresearchfacility.com> wrote:

    Hi!
    
    I've recently expanded our XenServer Pool and had to notice that E5-
    2630 v2 are far different from E5-2630 v4. Due to Dell's R630 BIOS i'm
    unable to use Intel FlexMigration. So I'ld loose the live-migration
    feature.
    Anyway. I'ld start introducing a new XenServer Pool (ACS Cluster) with
    that newer CPU Generation.
    
    My Question is: Is it possible to use the same (FC/presetup) Primary
    Storages for both Clusters?
    I've seen cluster.storage.operations.exclude (which defaults to false)
    but currently don't know if this would need to be set to true on the
    second cluster.
    
    Would you expect any problems running two XenServer Pools (say: two ACS
    Clusters) with the same Primary Storages?
    
    Thanks for any advice!
    
    cheers,
    
    - Stephan
    
    
    


Dag.Sonstebo@shapeblue.com 
www.shapeblue.com
53 Chandos Place, Covent Garden, London  WC2N 4HSUK
@shapeblue