[pve-devel] Add functionalities

[VELARTIS Philipp Dürhammer]

Hi,

a better solution would be to work with lvm snapshots and deltas. You just have to move the small delta. And therefore you can do this every hour or even more aften..
i dont know i fit is also possible with vzdump but it is also capable of making deltas. But ist not the same like applieng the delta direct tot he storage target like on lvm...

Like this it sould be possible to archieve something like vmware has allready.
Some tool like this would be actually cool in proxmox for some guis with smaller environments.
For bigger ones and maybe for you using ceph instead of your san would be better....

-----Ursprüngliche Nachricht-----
Von: pve-devel [mailto:pve-devel-bounces at pve.proxmox.com] Im Auftrag von Michael Rasmussen
Gesendet: Mittwoch, 15. Oktober 2014 17:23
An: pve-devel at pve.proxmox.com
Betreff: Re: [pve-devel] Add functionalities

On Wed, 15 Oct 2014 17:02:25 +0200
Serge NOEL <serge.noel2008 at gmail.com> wrote:

> Exactly, we are working on disaster scenarii and we want to find quick 
> solution in case of SAN failure.
> In this case, we imagine that SAN will be unavailable, and we hope to 
> be able to restart with NAS (iSCSI) as replacement target, if we are 
> able to make copy of all VM, (it seems OK, i tried to copy lvm volume 
> group with dd
> : it's works) during normal operations. Doing so, in case of failure, 
> all we have to do is : to say to Proxmox to use disk from different 
> iSCI (or
> NFS) target.
Isn't that dangerous? I mean your approach will surely cause the loss of data since all changes between the time of creation of the fall-back disk an the incident will be lost!

If you need uptime like 99.999% you should drop you single point of failure SAN an move on to clustered storage since clustered storage is the only viable solution to your high demand on uptime.

--
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Michael Rasmussen

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