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From Bryan Whitehead <dri...@megahappy.net>
Subject Re: Multiple secondary storage
Date Thu, 20 Sep 2012 18:11:58 GMT
By random you mean given equal usage or some factors like that right?
If one of the secondary storage nodes is filling up I'd hope the empty
one would be weighted more in a random selection...

On Thu, Sep 20, 2012 at 3:11 AM, Nitin Mehta <Nitin.Mehta@citrix.com> wrote:
> Tamas - That's not entirely correct.
> All the public templates will be replicated to all the secondary storage for redundancy
but private templates would be kept in one of the randomly chosen secondary storage.
> Snapshots will be randomly copied to one of the secondary storage (the chain of incremental
snapshots are kept on the same secondary storage.)
>
>
> -----Original Message-----
> From: Tamas Monos [mailto:tamasm@veber.co.uk]
> Sent: Thursday, September 20, 2012 3:11 PM
> To: cloudstack-users@incubator.apache.org
> Subject: RE: Multiple secondary storage
>
> Hi,
>
> As far as I am aware if you are using more than one secondary storage then the system
will use both storage but will not replicate any data.
> This means if your snapshot is stored on a secondary storage that is in Error state/down
then any operation related to that data (template,ISO,snapshot) will error out/fail and there
is no way to recover from it unless you bring the storage back online or via database hack.
> You will still see everything on the GUI as it does come from the database so make sure
your storages are running. Use NFS failover or redundant storage hardware.
> I'm not sure about the latest version I'm on 3.0.2
>
> Regards
>
> Tamas Monos                                               DDI         +44(0)2034687012
> Chief Technical                                             Office    +44(0)2034687000
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>
>
> -----Original Message-----
> From: Bryan Whitehead [mailto:driver@megahappy.net]
> Sent: 20 September 2012 09:45
> To: cloudstack-users@incubator.apache.org
> Subject: Multiple secondary storage
>
> If I add more than 1 secondary storage to a zone, are they all treated different? Is
there replication going on like copying templates and snapshots between the two?
>
> If I have a template or snapshot on a secondary storage that is down do i still see it
in the GUI but am just unable to use it?
>
> -Bryan
>
>

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