Re: [Xen-community] XCP, XenServer and CentOS dependences

[Joseph Glanville <joseph.glanville@xxxxxxxxxxxxxx>]

Hi,

Both XenServer and XCP are "RHEL" compatible so to speak and are based
off of the CentOS community distribution as you pointed out.
You can think of them as virtualization appliances, whereas Xen is
just a hypervisor - in and of itself it doesn't provide enough
funcationality for a fully working system.
For that you require a fully configured dom0, storage and networking
subsystems - this is the point of XenServer and XCP.

In reality XCP can be likened to being an open-source version of
XenServer, they share the xe toolstack, XAPI and use the same storage
and network resource abstractions.
This isn't strictly required to operate in a "cloud" environment but
they sure make things easier.
One of the primary subsystems in a distributed virtual environment is
messaging and resource abstraction, XCP can handle this for you.

Conversely Xen on CentOS uses the xm/xend toolstack and leverages
distribution scripts to deal with varying amounts of network and
storage tasks - however the majority is left up to the adminstrator
and requires significantly more configuration to arrive at usable
system.

Joseph.


2012/2/16 Kamil Gardziejczyk <belussi.pl@xxxxxxxxx>:
> Hello,
>
> For few last days, I`ve been trying to install and configure XenServer and
> XCP. Everythings works fine,but  I wonder how the XenServer or XCP is
> bulit..
>
>
> It is based on CentOS? There is some special agreement between Xen community
> (or Citrix) and CentOS community?
> It is obvious that is based on Xen. If I download XenServer source and check
> xen rpm package version there is e.g.: xen-4.1.1-6.0.0.210.23215. Is it
> fully compatible with xen 4.1.1 or they  introduce some variations to make
> it possible to run in "Cloud" enviroment?
>
> In general,I would like to know how the realtions between Xen, XenServer,
> XCP and CentOS look.
>
> --
> Kamil
>
>
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>



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