Re: [Xen-users] Best practice to backup dom0 and all domU's

[Rudi Ahlers <Rudi@xxxxxxxxxxx>]

Stefan de Konink wrote:
> On Tue, 25 Mar 2008, Rudi Ahlers wrote:
>
>   
> > Stefan, you may have a spare server in the office for this, but in a
> > hosting environment, you have to pay for every server you want, and I
> > have to be honest with you, it's cheaper to buy 200GB FTP space, than
> > another server JUST for backups. And I don't see why any host who
> > doesn't offer / use iSCSI should suddenly start offering it just cause
> > OpenSolaris is free. Cause what you say is to have an iSCSI server with
> > the VM's on, and then backup that server, so that means you'd need 3
> > physical servers
> >
> > OpenSolaris isn't the answer to everything.
> >     
> I'm a contracter for a company that is in the same situation. And having a
> storage infrastructure is something you get customers with, usually not
> loose. But all depends on how big you are. I think 24 Xen servers with one
> fileserver is not a bad ratio. 1:1 is...
>
> Stefan
>
>
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>
>   
Yes, I understand what you're saying.

But, let's say you offer the following VPS options:
1. 512MB RAM / 10GB space
2. 1024MB RAM / 20GB space.

Then, on a dual Xeon (4 cores) with 16GB RAM, you could have 15 / 30 
VPS' per physical server. So, you suggest have a iSCSI server, and back 
that up, which means you need 3 physical servers to host the same 20 
VPS' - which doesn't make sense. There should be a better way to backup 
the VPS' directly from the main server, to the FTP server, which is 1/4 
the price of a physical server in most cases
--

Kind Regards
Rudi Ahlers
CEO, SoftDux

Web:   http://www.SoftDux.com
Check out my technical blog, http://blog.softdux.com for Linux or other 
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