[Linux-cluster] Cluster with shared storage on low budget

[Jeff Sturm]

> -----Original Message-----
> From: linux-cluster-bounces at redhat.com
[mailto:linux-cluster-bounces at redhat.com]
> On Behalf Of Nikola Savic
> Sent: Tuesday, February 15, 2011 3:09 PM
> To: linux clustering
> Subject: Re: [Linux-cluster] Cluster with shared storage on low budget
> 
> Jeff Sturm wrote:
> > We actually resize volumes often.  Some of our storage volumes have
30
> > LUNs or more.  We have so many because we've virtualized most of our
> > infrastructure, and some of the hosts are single-purpose hosts.
> >
> 
>   Can you please provide more information on how storage is organized?
> 
>   Are you using SAN or local hard disks in nodes? Is there mirroring
of data and how is
> it implemented in your system?

To answer your questions, these nodes are paravirtualized under the Xen
hypervisor.  The physical volumes are kept on a central storage server
(commercial SAN appliance), organized into a clustered volume group by
CLVM.

Out of that volume group we have 30+ logical volumes, each of which are
simple filesystem images, mounted as the root filesystem on one of the
virtual hosts.

-Jeff