WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

Re: [Xen-users] high availability iscsi and xen setup

On Fri, Nov 05, 2010 at 10:54:20AM +1100, James Harper wrote:
> > 
> > I was originally planning on having 8 gigabit ports on each DRBD
> > (storage) server, going in to 2 seperate switches using multipathing.
> > each xen host would also have 2 gigabit links in to each switch also
> > using multipathing.
> 
> I guess it depends on your disk bandwidth. If you have >200Mbytes/second
> disk throughput then you'll need to add more network ports to prevent it
> becoming a bottleneck. I'd definitely be plumbing the DRBD network
> connections through directly though. At least if you have a switch
> failure you won't get split brain.
> 
> > This way I would be covered for switch failure also, any thoughts on
> > that? This would mean running DRBD and "SAN" traffic on the same
> > network, is this not advisable?
> > 
> > alternatively direct connected 10G CX4 port for DRBD traffic and 4
> ports
> > (2 in to each switch with multipathing) would also be good I guess?
> 
> Every write goes to the primary DRBD server which then sends it to the
> secondary DRBD server. I figure that keeping them on separate networks
> is a good idea.

Thanks for your replies James. With regards to network redundancy, what
do to ensure a switch failure doesn't affect your uptime? Do you have
any opinion on including multipathing in the setup?

Cheers,
Mark

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users