[Mongrel] [Slightly OT] Do you use virtualization in production ?

Luis Lavena luislavena at gmail.com
Mon Oct 2 20:23:47 EDT 2006

On 10/2/06, Ezra Zygmuntowicz <ezmobius at gmail.com> wrote:
> On Oct 2, 2006, at 4:40 AM, Thibaut Barrère wrote:
> > Hi!
> >
> > I've been using parallels, vmware player, or virtual pc (did not
> > try xen yet) for development, testing and experimenting with new
> > platforms (and I must say I love them - copy paste a few files, and
> > I have a clean deployment box etc)
> >
> > Since the RailsConf and various talks I've seen (like Jason
> > Hoffmann's http://svn.joyent.com/public/JasonHoffman-
> > EuroRailsConf.pdf , or James Duncan Davidson), I'm willing to apply
> > the benefits to production.
> >
> > is there anyone here actually using virtualization techniques in
> > production ? (even for single machine setups?)
> >
> > any feedback would be most welcome!
> >
> > thanks!
> >
> > Thibaut
>         Yeah now that I have been way into Xen, I wouldn't setup a new
> server without it. Even if you only have one server I would put Xen
> on it, even if its just one huge VM that fills the entire server. The
> performance overhead of Xen is about 5% compared to raw hardware
> which is really nothing compared to  the gains you get by virtualizing.
>         It makes it so much easier to scale later. Move your VM's from
> machine to machine. And separate concerns into their own VM's.
> Seriously I can't recommend it enough. We have built our entire new
> business on top of Xen. http://engineyard.com . Its only for ruby/
> rails hosting and everything runs in Xen. Xen is very cool stuff.

Ezra, one thing that still bug me is IP handling. If i have a live
server and decide to do a hot migration to a newer box, how it
manages, and how much downtime will get to the IP switches ges
notified of the migration? (in ms resolution)

Or i'm forced to have a load balancer that handle the problem for me?

> -Ezra
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Luis Lavena
Multimedia systems
Leaders are made, they are not born. They are made by hard effort,
which is the price which all of us must pay to achieve any goal that
is worthwhile.
Vince Lombardi

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