[Xen-users] What is "XenExpress"? (was: Does it legal to analysize XEN source code... etc)

[Evan Lavelle <sa212+xen@xxxxxxxxxxx>]

Tim Post wrote:

> No its not. XenEnt is not GPL. It does not contain GPL code. It is not a
> community 
> developed product. How are they pushing anything? Xen (GPL) and Xen
> (ENT) are two
> completely different code bases from my understanding, or you would get
> source code
> with XenEnt. 
Well, I'm new here, but this doesn't fit in with my naive reading of the 
website. The FAQ says "Operating systems or other applications written 
to use Xen's hypercall interface are not derived works of Xen, hence may 
be licensed differently" (ie. not GPL'ed). The XenSource website talks 
only about using "Xen". The website makes it pretty clear that 
XenEnterprise and XenServer are simply value-added versions of Xen, for 
which they charge money; that's exactly what RedHat/etc do.
As a newbie, I'd really appreciate a FAQ entry (which is not likely to 
be provided by XenSource): what is the difference between XenExpress and 
the code that we can compile ourselves? As far as I can make out:
- XenExpress is hobbled (4 VMs, 4GB)

- XenExpress has some Windows drivers; the open-source version may not 
run well with Windows guests
- XenExpress installation requires your whole drive (what does that 
actually mean)?
- Installing the open source code can be a nightmare; XenExpress 
presumably works out-of-the-box
Improvements/corrections?

Evan

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