RE: [Xen-users] MSSQL and Xen performance

[Nathan Eisenberg <nathan@xxxxxxxxxxxxxxxx>]

Hey Chris,

Well, for one, consultants don't refuse to do things.  If this one is, you have 
a problem already.  Beat him until he understands what he's being paid to do.  
:)

I've had MSSQL on XEN before, and it worked fine - but an answer to your 
questions is going to depend on a lot of things:

Version of XEN
XEN server/farm specs
Storage Backend
Load on the MSSQL server
CPU for the MSSQL server instance
Memory for the MSSQL server instance
Plan to use PV drivers?
Etc...

You do have to accept some performance loss over bare metal, especially with 
HVM (fully virtualized) domains.  I've found Virtuozzo (nonfree) to be 
generally a more effective Windows Server virtualization platform.  That said, 
I use XEN for several major production deployments of Windows and Linux hosts.

Best Regards
Nathan Eisenberg
Sr. Systems Administrator
Atlas Networks, LLC
support@xxxxxxxxxxxxxxxx
http://support.atlasnetworks.us/portal


-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Chris Black
Sent: Thursday, May 07, 2009 2:31 PM
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] MSSQL and Xen performance

Hello,

I am working on a xen platform and need to create an MSSQL server. My  
consultant who is doing the installation and setup is refusing to  
install on XEN because he says it will cause to much lag and  
performance issues with the system.

Has anyone done an MSSQL+Xen install before and have you experienced  
any major performance problems? Would the community at large recommend  
a setup like this?

Thanks.

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