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Oracle Virtualization Linux

Linux 3.0 Will Have Full Xen Support 171

Posted by timothy
from the complex-mellow-calm dept.
GPLHost-Thomas writes "The very last components that were needed to run Xen as a dom0 have finally reached kernel.org. The Xen block backend was one major feature missing from 2.6.39 dom0 support, and it's now included. Posts on the Xen blog, at Oracle and at Citrix celebrate this achievement."
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Linux 3.0 Will Have Full Xen Support

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  • Meanwhile (Score:5, Interesting)

    by TheRaven64 (641858) on Friday June 03, 2011 @03:57AM (#36328932) Journal
    Xen Dom0 support has been supported in released versions of NetBSD and Solaris for something like 4 years, while the VMWare lobby on the LKML was requiring the entire paravirtualisation subsystem to be rewritten before they'd accept patches, and Red Hat decided to push KVM as a Xen replacement, in spite of them having very different capabilities.
  • by Anonymous Coward on Friday June 03, 2011 @04:04AM (#36328964)

    Nice try, except dom0 (Domain zero) is Xen terminology, not something linux specific.

    Products such as this aren't going to be used by mainstream mom&pop users, Xen will likely not be available in boxed set at your local computerstore or gameshop. The people using this will likely always come from an IT related background.

    And as for windows:
    - If you run Xen with Windows, the same terminology applies (except it would be run as dom1+ since Windows doesnt support dom0 to my knowledge)
    - If you open up a MCSE manual for windows you'll find a hundred other things that sound just as complicated to a layman as dom0

  • by Anonymous Coward on Friday June 03, 2011 @04:49AM (#36329134)

    This is the worst company ever and Larry Ellison is greedy. If you are a Sun workstation owner read below:

    http://www.newser.com/story/76753/americas-greediest-people.html

    America's Greediest People
    Larry Ellison heads up a list full of no-good rich folks
    By Kevin Spak, Newser Staff

    Posted Dec 23, 2009 2:12 PM CST

            STORY
            COMMENTS (36)

    Email Share

    (Newser) – These days, it’s easy to fill up a “greediest Americans” list. Just ask TooMuch.org, a site devoted entirely to “excess and inequality.” “We could fill an entire top 10 just with bankers from Goldman Sachs,” it boasts. The list:

            Larry Ellison: The really galling part isn’t the fortune he spent on his yacht—including $10 million for the mast alone. It’s that the Oracle CEO contested the $166.3 million tax appraisal on his mansion, ultimately costing local schools $250,000 a year.

            Richard Scott: Scott, CEO of Columbia/HCA Healthcare Corp. during its Medicare fraud scandal, led the year’s media blitz against Democrats’ health care reform efforts.
            Mark Hurd: Hewlett-Packard’s CEO jacked up ink prices, while firing 6,000 workers and cutting salaries. He, meanwhile, took home $26 million.
            Rupert Murdoch: One day, while cruising on his $30 million yacht, Rupert decided to start the drumbeat to charge for newspaper articles. Probably because his annual take-home from News Corp had fallen to a meager $27.5 million.
            For the full list, click the link above.

  • by mcgrew (92797) * on Friday June 03, 2011 @09:19AM (#36330262) Homepage Journal

    I had 15 points just this Wednesday. But it does seem that there is less momoderation lately; 100 comments with all at 1 or less. Maybe all of the mods but me are downmodding? (Of the 15 I had, all but two were upmods)

  • by martyros (588782) on Friday June 03, 2011 @09:47AM (#36330556)

    But doesn't that just make Xen the OS with linux becoming an application? I mean, it is the OS's job to manage memory and devices, and to allocate CPU time.

    No, Xen is a hypervisor. A process expects a *lot* more from an operating system than an OS expects from a hypervisor. VMs expect raw hardware and know they have to manage most things (like setting up memory, doing filesystems, and so on) themselves. Processes expect an operating system set up memory mapping for them, give them filesystems (not just raw disks), IP addresses and sockets and TCP (not just raw packets), and so on.

    In the KVM case, Linux is an operating system to normal processes, but a hypervisor to VMs. Linux gives memory and time to the guest OS, and the guest OS gives memory and time (along with filesystems, TCP, &c) to guest processes. So in that way Xen and KVM (i.e., Linux-as-hypervisor) are the same.

    The main difference is that Xen is only a hypervisor, whereas with KVM, Linux tries to be both a hypervisor and an operating system. That has a number of practical implications. Xen has been widely deployed and tested as an enterprise-class hypervisor. I'm not aware of any large-scale enterprise deployments of KVM, so it remains to be seen whether Linux can successfully be both an enterprise-class hypervisor and an operating system at the same time.

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