On Fri, 2007-02-09 at 14:15 -0800, Tony Angerame wrote:
> Hello Xen group. I'm new to the list but so far I have had excellent
> response to my questions. Thank you! May I pose one general question to
> the group? I am evaluating Xen Para Virtualization for use at our site.
> How do you feel about it's: reliability, usability, utility? Is it a
> quality piece of software? Would you recommend it? Is it mature enough
> for a production environment? Does it perform well?
Xen has invaded pretty much everything I have to some degree, a few
hundred servers in all and growing.
All of my servers have at least 2 network cards so a private back end
network exists for storage, or even for the guests themselves to use.
This is what I have running in production with great success :
* Load balanced Lighttpd, php5/fastcgi, memcache cluster facilitated
with a virtual appliance made from pound ( www.apsis.ch/pound/ ), 2
running Apache, but I use lighttpd whenever possible.
* Classic MySQL Clusters
.. Then the above tossing in cluster FS's and a nas to make a single
I also use Xen as just a management layer, devoting 99.9% of resources
to single guests (just to save some trips to the DC to do reboots,
I 'start' each client with a small network of 1 or 2 guests and just
grow them to entire virtual networks as the users need it.
The trick to success with Xen is proper planning. Come up with a good
naming convention for your guests. A dom-u named www-centos doesn't work
well to keep things in order.
A dom-u named 1-c-43 with vif's named 1-c-43.0 1-c-43.1 (for eth0 eth1
respectively), helps keep things in order.
My recommendation :
Get a 3x3 dry erase board with 5 or 6 markers of various colors to go
with it, an eraser and a quiet place to sit down. Draw it all out, then
get to work :)
Good luck with Xen!
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