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RE: [Xen-users] How many guest hosts per physical host

To: "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] How many guest hosts per physical host
From: Nathan Eisenberg <nathan@xxxxxxxxxxxxxxxx>
Date: Mon, 21 Dec 2009 10:37:33 -0800
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Thread-topic: [Xen-users] How many guest hosts per physical host
> Using the name Virtuozzo and Virtualization in the same sentence is 
> being a bit optimistic. As far as density - on mysqlbench I'm losing 
> less than 1% to the exact same server running it native. In order to 
> get more density than that I think you'd have to be doing something amazing 
> unless your "virtualized" servers are faster than the real one. So how well 
> does that live migration between Windows servers work with Virtuozzo?
> As far as the cost, I have 190 Xen servers and I've never paid a dime. 
> As far as the community I'd think that 80 messages a day on the Xen lists 
> would be considered more than very little.



I think you may have misinterpreted my statement to mean that Xen is expensive 
and the user community is very small.  This is exactly the opposite of what I 
was saying: I was speaking about the downsides of Virtuozzo, and the advantages 
that Xen has over it.  

To be absolutely clear: Xen has an excellent, thriving user community, is free, 
and works fantastically.  Virtuozzo is neat for density (# of VMs running on a 
piece of hardware), but it’s not free, has no cohesive community, and lacks 
some of the features that Xen brings to the table.

Like you, I have many XEN servers deployed in production, and my job would be 
MUCH harder without it.

Best Regards,
Nathan Eisenberg
Sr. Systems Administrator - Atlas Networks, LLC
Xen-users mailing list