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A comment on VMWare Screw Customers. Parent comment

Re:VMWare Screw Customers by eru on Wednesday July 13, 2011 @11:09AM (#2759185)
There's also XenServer that's free as in beer and speech. But the freedom in speech is mostly theoretical, because it's so hard to build.
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Re:VMWare Screw Customers by zacgarrett on Wednesday July 13, 2011 @12:21PM (#2759438)
XenServer is actually the product name from Citrix. Xen is the open source project that is Open Source.

I know its being a stickler for the tiny facts, but when you are a XenServer admin find the differences rather quickly.

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Re:VMWare Screw Customers by eru on Wednesday July 13, 2011 @01:00PM (#2759617)
Xen is a hypervisor. XenServer is the product name from Citrix which uses Xen underneath. Xen Cloud Platform is actually the name of opensource xenserver.

You wouldn't use just Xen as a hypervisor, in most cases. Amazon uses Xen plus their own stuff on top.

To make it more complicated, there's also XenClient, which also builds on Xen. It's also mostly open source.

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