Why do I have to be root or even to recompile my kernel in Linux to get a new filesystem to run? Why can't I just start a program which takes care of the filesystem for me, and only for me? In contrast, current systems (like Linux, MacOSX, Windows or others) require root/admin access to just install a new file system for reading out a nonstandard USB-stick (OK, who'd put reiserfs, zfs or similar on a USB stick? but still.). You don't restrict others from doing what they want.' 'With the Hurd, users can change anything in their system which doesn't affect otherĪnd this is one definition of freedom in a community: 'Do what you want as long as XenServer is a commercial product from Citrix and very different from Xen.I'm just a Hurd dabbler who likes the ideas behind the Hurd: Unles other hypervisors, Xen will fall back to pure paravirtualization mode on unsupported hardware allowing you to virutaulize Xen aware guests on any hardware (x86圆4). Linux is the most common since Red Hat and Novell provide a fully supported version of Xen. Installing Xen from Red Hat makes the whole thing look like RH Linux is installing but does the EXACT same process with different messages to the end user. The difference between ESX and Xen is that VMWare packages the whole thing as ESX and makes it look like ESX is installing but it installs Red Hat Linux on top of it. I dont believe on skimping on hardware when running production systems on virtual platforms. Scott Alan Miller is the best person to speak to about this. It also comes with graphical management tools that you can use to configure your Xenserver. The Citrix Xenserver is a pre-package installable OS which you can easily install on any compatible hardware. VMWARE use binary translation instead of paravirtualization. VMWARE also makes use of a Linux OS called RedHat and now Busybox for ESXi to boot the physical server. This method of virtualisation requires the assistance of special CPU technology called VT and AMD-V.Īlso, the operating systems that are going to run on Xen needs to be Virtualization aware. The host operating system from which Xen runs has privilege access to the hardware and with all the guest VMs having unprivileged access. In order for the Xen software to work it has to be able to access other resource such as storage, network adapter, etc and rather than reinventing the wheel, it uses an existing OS such as Linux to achieve this.

It deals with the complexities of providing a virtual x86 platforms for operating systems to run.

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