CentOS - Dec 2007 - RAID-1 strategy for a CentOS/Xen server?

Hi,

I'm planning to migrate my current server configuration:

    AMD Athlon/X2
    FreeBSD 62-Release
    2 x 250GB HW RAID1 (all partitions RAIDed, incl. swap)

to a Xen/CentOS config:

    AMD Athlon/X2
    Dom0
        CentOS 51
        Xen 31
    Dom1/1
        FreeBSD 7
    Dom1/2
        CentOS 51
    ...

To "best preserve" RAID1 mirroring protections of OS, Data, etc

    *AND*

optimize performance, how should I setup RAID for the "new"
configurations?

Should DOM0 be RAIDed?

Each DOM1, as well?

Should I continue to use HW RAID or switch to SW?  A mix?


I understand I can do any/all ... choosing the "right" option is the
goal,
here.

Advice is appreciated.

Regards,

Bob Tompkins
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On Dec 7, 2007 1:04 PM, Bob Tomkins <bob.r350 at gmail.com> wrote:
> To "best preserve" RAID1 mirroring protections of OS, Data, etc
>
>     *AND*
>
> optimize performance, how should I setup RAID for the "new"
configurations?
The entire system I would install on HW RAID, and use LVM for
flexibility in domU configurations.  You can do things like take LVM
snapshots and have a clone of your system available for testing, for
instance.

In a recent Red Hat class that I took (RH436 - clustering and storage)
we had a dom0 and several domU's - all of the domU's were actually
snapshots of one "gold master" if you will, so that:

1) The amount of storage required is reduced
2)  The ability to quickly rebuild one of the domU's to a
"known-good"
configuration.

Let me know if you have any further question!

-Jon