On Thu, Nov 27, 2008 at 05:10:30PM +0100, Thomas Halinka wrote:
> Am Samstag, den 22.11.2008, 20:19 +0400 schrieb Nicolas Ruiz:
> > Hi all,
> >
> > I'm pretty interesting study this kind of solution for my office.
> > Following questions from Pasi, i would like to know from you, Thomas,
> > if you are using a SAN for your cluster.
>
> i build up my own SAN with mdadm, lvm und vblade.
>
> > If so, what kind of data access technologies you use with.
>
> ATAoverEthernet, which sends ATA-commands over Ethernet (Layer2). It's
> something like SAN over Ethernet and much faster than iscsi, since no
> tcp/ip is used. also failover was very tricky with iscsi....
>
OK.
>
> >
> > Last question, how do you manage HA, Live migration and snapshots :
> > owned scripts ?
>
> heartbeat2 with crm and constraints and the rest is managed through
> openqrm.
>
Hmm.. so openqrm can take care of locking domU disks in dom0's for live
migration? ie. making sure only single dom0 accesses domU disks at a time..
> >
> > This is interesting. Want to tell more about your setup? CLVM?
> > iSCSI?
>
> nope, just AoE and LVM
>
> >
> > What kind of physical server hardware? What kind of storage?
>
> It s self-build. We had evaluated FC-SAN-Solutions, but they were slow,
> unflexible and very expensive. We 're using Standard-Server with bonding
> over 10Gbit-NICs
>
> This setup transfers 1300 MB/s at the moment, is highly scaleable and
> was about 70% cheaper than a FC-Solution.
>
Ok.
> >
> > What exact kernel and Xen versions?
>
> at the moment its xen 3.2 and 2.6.18-Kernel. I am evaluating 3.3 and
> 2.6.26 atm.
>
> >
> > Thanks!
> >
> > -- Pasi
>
>
> If interested in this Setup, i could get you a overview with a small
> abstract, what is managed where and why... you know ;)
>
Yeah.. picture would be nice :)
And thanks for the answer!
-- Pasi
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