[Xen-users] Re: [Fedora-xen] Xen - large virtual machines

["Alex Davies" <alex@xxxxxxxx>]

Thank-you everyone for your suggestions; some extremely useful points
have been raised for which I am very grateful.

To answer Erin's questions: we are running RHEL/Xen because we have a
business requirement for a decent number of RHEL virtual machines
(~30). We could run ESX (or KVM, or...) but we (I) am also keen to try
to use Xen for real - i've used ESX a lot. There are also licensing
benefits for my company that make Xen on RHEL > ESX / KVM.

I would love to use ZFS, but unfortunately my Solaris foo is ~0, and
consequently we shall have to stick to Linux/ext3. RedHat assure me
that if I keep each filesystem to <10T this is supported and
encouraged.

Based on feedback from this post (and elsewhere), we have decided to
go for 2 ISCSI boxes and 2 Thumpers. Two of our virtual machines
require >30T of storage, and no redundancy, so we will run one VM on
each Thumper (with local storage). The other ~30 VMs will run using
the ISCSI volumes to allow live migration.

I'm sure i'll be posting here when it comes to getting this lot
working, but if anyone has any advice for this setup please let me
know!

Many thanks,

Alex







On Thu, Sep 11, 2008 at 6:55 AM, Ask Bjørn Hansen <ask@xxxxxxxxxxxxxx> wrote:
>
> On Sep 5, 2008, at 13:37, Alex Davies wrote:
>
>> using the remaining 6 drives for RAID-10 for DomU
>
> Unless you meant "for Dom0", then beware that software RAID-10, LVM and Xen
> doesn't work:
>
>        https://bugzilla.redhat.com/show_bug.cgi?id=223947
>        https://bugzilla.redhat.com/show_bug.cgi?id=224077
>
> --
> http://develooper.com/ - http://askask.com/
>
>
>



-- 
Alex Davies

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