Re: [CentOS-virt] Xen version

[Evan Fraser]

Hi Paul,
I use Xen 3.4.2 in production on Centos with Windows 2003 server virtual 
machines using those GPL PV drivers.  I put it into production in March this 
year I think.

The only stability problems I’ve had has been because my Xen servers are using 
an NFS root from an at times overloaded NFS server.

 Thanks, Evan.

Evan Fraser

Senior Systems Analyst
Peninsular House, 30 Monument Street
London EC3R 8NB, United Kingdom
Tel +44 20 7444 7860
Mobile +44 75 9024 5788
evan.fra...@rms.com
www.rms.com

From: centos-virt-boun...@centos.org [mailto:centos-virt-boun...@centos.org] On 
Behalf Of Paul Piscuc
Sent: 16 December 2010 09:01
To: centos-virt@centos.org
Subject: [CentOS-virt] Xen version

Hi,

We are thinking of using CentOS with XEN in production, but we are facing some 
issues regarding the 3.0.3 version of the xen hypervisor and windows 
paravirtualization. The drivers we are using are from here 
(http://wiki.xensource.com/xenwiki/XenWindowsGplPv). The solution we found is 
upgrading to xen 3.4.2, using a strange repository (gitco.dehttp://gitco.de), 
and everything seems to work. Now the question is: would you recomand using the 
3.0.3 kernel provided by CentOS in production and searching for other 
paravirtualization drivers, or go with 3.4.2? Is this version of the hypervisor 
stable?


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Re: [CentOS-virt] IBM GPFS filesystem

[Evan Fraser]

Adam Wead amsterda...@... writes:

 
 Hi all,I was wondering if anyone might be able to speak about using IBM's GPFS
filesystem as a means of storing virtual guests in a clustered environment with
CentOS as the nodes and KVM as the hypervisor?
 I'm looking at using IBM's TSM software for archiving data from disk to tape. 
This requires buying a license for GPFS which is used in conjunction with TSM
but can also be used as a clustered filesystem as well.  As I understand it,
GPFS can work with CentOS so long as you're using the right kernel.Is anyone out
there using CentOS+GPFS for their virtualization environment?many thanks in
advance,...adam
 
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Hi Adam,
I use GPFS as my filesystem for my Centos-Xenvirtual environment.

The Virtual servers are converted Compute nodes, running Centos 5.4 with Xen
3.4.2 and have Infiniband connectivity to the NSD servers.  The VM's all live on
the GPFS filesystem.  This has worked pretty well, the disk performance of the
VM's has been good when using the GPL paravirt drivers (my VM's are windows
server 2003).

I'm currently in the process of trying to re-setup the infrastructure using
stateless Centos+KVM Virtual servers instead, but its too early to tell if its
working or not.

Good luck,

Evan.



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