05-06-2008
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Join Date: Jun 2003
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Is Virtualisation Right for Colo?
Hi guys
I'm going to be moving a linux box into collocation to support the growing demands of my sites and have been trying to figure out if Xen is right for me. I'd appreciate hearing some real-world experience with the overhead involved and the optimal ways to slice up a box. Right now I feel I should either do an all-in-one setup with a hardened installation, use Xen to virtualise services I would normally run on other machines (such as DNS and SQL) and/or use Xen to rent out VPSes.
My main concern is that I don't have unlimited resources on this box, it's a dual p4-style 3.06GHz xeon with HT and 4 gigs of old ddr. So far I am going to need to accommodate the following:
- about 100,000 script-generated page views a day, with room for spikes, floods and other attacks
- dns services for about 30 domains, only three well traveled
- sql
- mail
Is Xen practical for my situation? I'm intrigued by the ability to replace and migrate virtual servers in a snap but not sure if the performance cost makes it more effective than a traditional solution. Any input is appreciated!