Xen Server

What are the major differences in running XEN supported releases ISO vs using XEN installed on top of a *nix based operating system? Are there any pros or cons in performance and usability?
KonfigurationKingAsked:
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Mohammed KhawajaConnect With a Mentor Manager - Infrastructure:  Information TechnologyCommented:
Xenserver from Citrix has the OS built in and it is optimized for virtualization as well as it is a cutdown version of the OS.  This way you just install from the ISO and don't have to worry as to what packages to install and secure.  This is how VMware is also packaged.
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Dirk KotteSECommented:
as explained by mnkhawaja, XenServer by citrix is an optimized, ready to use solution with the option to buy professional (and really helpful) support. A really enterprise solution like VMware.
But the citrix xensever has some hardware-limitations.
The new XenServer6.2 from Citrix is completely free without big functionality-restricions (Support and Auto-Updates only)

The xen packages are more flexible regarding the Host OS and Hardware.
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KonfigurationKingAuthor Commented:
Is the support and auto-updates availible for xen on fedora linux or other distro?
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Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
Each distro has update utility and yes, Xen updates are included.  If anyone is thinking of implementing Xen, I suggest to use the one provided by Citrix.
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KonfigurationKingAuthor Commented:
Surely there would be some advantages with using a prebuilt kernal from a main distro. What would be those advantages?
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Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
You could use a distro like Centos, Suse, etc. if you want additional services running on the same server (ie. DNS, Apache, FTP).
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KonfigurationKingAuthor Commented:
Ahh now it makes sense! Additional services it seems that that would be a small advantage... when you could simply run those services on a virtual machine.
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