Is Virtualisation Right for Colo? Post: 302192193

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Special Forums UNIX and Linux Applications Is Virtualisation Right for Colo? Post 302192193 by Karma on Tuesday 6th of May 2008 08:29:29 AM

05-06-2008

Registered User

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!

Karma

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LEARN ABOUT DEBIAN

dtc-xen_migrate

dtc-xen_migrate(8)					      System Manager's Manual						dtc-xen_migrate(8)

NAME

       dtc-xen_migrate - migrate a VPS to another Xen server

SYNOPSIS

       LOCAL_VPS_ID DESTINATION_HOSTNAME [ DEST_VPS_ID ]

DESCRIPTION

       dtc-xen_migrate	This  shell  script  is a part of the dtc-xen package that is to be used by the dtc panel to manage a Xen VPS server. Note
       that you need rsync in both the source and the destination dom0.

       This script is used to move the content of a Xen virtual machine (VM) managed with dtc-xen to another Xen server of the same type.  The	VM
       destination will first be prepared, then the local VM will be shut down, then it's content will be transfered over using rsync.

       Note that this is NOT a live migration, and down time of approximatively the time needed for the rsync will occure.

PARAMETERS

       LOCAL_VPS_ID The DTC-Xen id of the VM, from 00 to 99.

       DESTINATION_HOSTNAME Destination Xen server hostname to migrate to.

       DEST_VPS_ID Destination DTC-Xen id of the VM, from 00 to 99.

EXAMPLE

       dtc-xen_migrate 19 alpha.example.com 21

       This will migrate the content of xen19 on the local machine to the destination server alpha.example.com using xen21 as VM name.

SEE ALSO

       dtc_reinstall_os(8), dtc_kill_vps_disk(8)

																dtc-xen_migrate(8)