Re: [Xen-users] best setup for live failover

[Bart Coninckx <bart.coninckx@xxxxxxxxxx>]

On Tuesday 10 August 2010 22:44:43 Donny Brooks wrote:
>  Well the disk box we are looking at is the Dell MD3000i so iscsi is an
>  option. Does xen handle that better than other protocols? I am kinda new
>  to the whole shared network disk stuff.
> 
> > On Tuesday 10 August 2010 20:53:07 Donny Brooks wrote:
> > >  Also let me explain my planned roadmap. Instead of buying huge Dell
> > > T710 style servers with cpu, ram, and disks, from this point on I would
> > > like to just have a NAS or two and then have some small 1U server that
> > > have the cpu and ram to run the guests on. That is the main reason for
> > > the live failover.
> > >
> > > > I am about to get a few extra servers and hopefully a NAS for here at
> > > > work. Currently all of our VM's are on one host that has a raid6 with
> > > > approx 12TB usable. The way I would like to set things up is to where
> > > > the disk images (we use lvm partitions for guest disks) sit on the
> > > > NAS and use something like DRBD or similar to allow live failover. We
> > > > are using Xen 4.0 on a Centos 5.5 Dom0 if that matters.
> > > >
> > > > So how would you recommend setting up the system to allow shared
> > > > storage (NAS) with live failover using lv disks? I wouldn't need to
> > > > failover every guest, just the primary ones like mail, web, ldap.
> > > > Thanks for any input.
> > >
> > > _______________________________________________
> > > Xen-users mailing list
> > > Xen-users@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-users
> >
> > For DRBD you need a something to do the DRBD and you would need two NAS
> > boxes. How about using your NAS as an iSCSI box?
> >

It's one of the more standard protocols to do that, but it's not the only one. 
But with the MD3000i it makes the most sense I think. Mind you, your MD3000i 
will be a SPOF. Look at my other reply regarding a HA solution.

B.

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