Re: [Xen-users] Xen versions

["Fajar A. Nugraha" <fajar@xxxxxxxxx>]

On Thu, May 14, 2009 at 3:54 AM, Jason Brooks <jason@xxxxxxxxxxxxxxx> wrote:
> Hello,
>
> I am running CentOS 5.3.  It has a redhat-patched xen 3.03, libvirt 0.3.3,
> virt-manager 0.5.3, and python-virtinstall 0.300.2.

It's actually Xen 3.1.2+. Run "xm info".

>
> I have noticed that the book running xen refers to xen 3.1,

... which is the same as what Redhat/Centos use.

> and the latest
> on xen.org is 3.3.1.  I can't find any change files to show what the actual
> differences are between versions, and what features have been added, or
> stabilized.
>
> Will I be better off upgrading all of these?  Will I be less stable if I
> don't?

That depends on what you need.
>From stability point of view, both RH's version and the latest Xen
3.3.1 has been stable for me.
>From support point of view, RH support will help you only if you run
their version (assuming you have an active subscription).
>From features point of view, Xen 3.3.x has many new features over Xen
3.1 (http://www.xen.org/download/ ,
http://www.xen.org/download/index_3.2.1.html). The feature I'm using
most which isn't available on RH's version is support for these
configuration directive :

vcpu_avail=VCPUS     Bitmask for virtual CPUs to make available
cpu_cap=CAP          Set the maximum amount of cpu.

If you use decide to use Xen 3.3.1 on RHEL/Centos, it might be easier
to use RPM from http://www.gitco.de/repo/

Regards,

Fajar

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