Mailing List Archive: Xen: Users

Xen or XCP

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sdj at rasmussenequipment

Jun 13, 2012, 7:41 AM

Post #1 of 4 (213 views)
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Xen or XCP

I was wondering if someone could direct me to a resource or provide their
own insights to differences between Xen and XCP. I have used Xen to go
virtual on a majority of my infrastructure (Except for one NT 4 box) and
was wondering if going with XCP would bring about any major benefits?

For instance, from what I understand from what I have read, XCP allows you
to create resource pools. The part of this I don't understand is if one VM
can spread across the entire pool or if it will still be tied to one piece
of hardware in the pool (CPU and Memory as storage will be on a NAS / SAN
anyways)?

Thank you in advance.

--
Shane D. Johnson
IT Administrator
Rasmussen Equipment

Ian.Campbell at citrix

Jun 13, 2012, 8:27 AM

Post #2 of 4 (187 views)
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Re: Xen or XCP [In reply to]

Hi Shane,

XCP questions are generally better asked on xen-api@ (bad list name, we
are working to fix that). I've CC'd that list.

On Wed, 2012-06-13 at 15:41 +0100, Shane Johnson wrote:
> I was wondering if someone could direct me to a resource or provide
> their own insights to differences between Xen and XCP. I have used
> Xen to go virtual on a majority of my infrastructure (Except for one
> NT 4 box) and was wondering if going with XCP would bring about any
> major benefits?

There is some content on the Wiki about this question. e.g.
http://wiki.xen.org/wiki/Xen_Overview
http://wiki.xen.org/wiki/Xen_or_XCP
http://wiki.xen.org/wiki/Choice_of_Toolstacks

> For instance, from what I understand from what I have read, XCP allows
> you to create resource pools. The part of this I don't understand is
> if one VM can spread across the entire pool or if it will still be
> tied to one piece of hardware in the pool (CPU and Memory as storage
> will be on a NAS / SAN anyways)?

If your storage is on NAS/SAN then yes, you can migrate virtual machines
between homogeneous hosts in the pool, or even heterogeneous hosts (from
the same vendor) if you configure "CPU levelling" appropriately.

Ian.

>
>
> Thank you in advance.
>
>
> --
> Shane D. Johnson
> IT Administrator
> Rasmussen Equipment
>
>
>
>

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Xen-users [at] lists
http://lists.xen.org/xen-users

rolu at roce

Jun 13, 2012, 12:25 PM

Post #3 of 4 (196 views)
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Re: [Xen-API] Xen or XCP [In reply to]

On Wed, Jun 13, 2012 at 5:27 PM, Ian Campbell <Ian.Campbell [at] citrix> wrote:
>> For instance, from what I understand from what I have read, XCP allows
>> you to create resource pools. The part of this I don't understand is
>> if one VM can spread across the entire pool or if it will still be
>> tied to one piece of hardware in the pool (CPU and Memory as storage
>> will be on a NAS / SAN anyways)?
>
> If your storage is on NAS/SAN then yes, you can migrate virtual machines
> between homogeneous hosts in the pool, or even heterogeneous hosts (from
> the same vendor) if you configure "CPU levelling" appropriately.
>

They'll still run on one host at a time though (I think Shane might be
asking this) so they get the CPU and memory of (part of) one of the
hosts. Like Ian says, you can easily move them between hosts in a pool
though.

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Xen-users mailing list
Xen-users [at] lists
http://lists.xen.org/xen-users

lars.kurth at xen

Jun 13, 2012, 4:15 PM

Post #4 of 4 (194 views)
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Re: Xen or XCP [In reply to]

See
- http://wiki.xen.org/wiki/Xen_/_XCP_/_XCP_on_Linux_Overview (very high
level comparison)
- http://wiki.xen.org/wiki/XCP/XenServer_Feature_Matrix
-
http://docs.vmd.citrix.com/XenServer/5.6.0fp1/1.0/en_gb/reference.html#hosts_and_pools
(for XCP 1.0 & 1.1)
-
docs.vmd.citrix.com/XenServer/6.0.0/1.0/en_gb/reference.html#hosts_and_pools
(for XCP 1.5)

On 13/06/2012 15:41, Shane Johnson wrote:
> I was wondering if someone could direct me to a resource or provide
> their own insights to differences between Xen and XCP. I have used
> Xen to go virtual on a majority of my infrastructure (Except for one
> NT 4 box) and was wondering if going with XCP would bring about any
> major benefits?
>
> For instance, f- rom what I understand from what I have read, XCP
> allows you to create resource pools. The part of this I don't
> understand is if one VM can spread across the entire pool or if it
> will still be tied to one piece of hardware in the pool (CPU and
> Memory as storage will be on a NAS / SAN anyways)?
>
> Thank you in advance.
>
> --
> Shane D. Johnson
> IT Administrator
> Rasmussen Equipment
>
>
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users [at] lists
> http://lists.xen.org/xen-users

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