"R.S." <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > Mark Post wrote: > >>>> On 11/12/2008 at 4:42 AM, "R.S." <[EMAIL PROTECTED]> wrote: > >> Tommy Tsui wrote: > >>> I have a question on z/VM. I understood z/Linux running on z/VM but why we > >>> need z/OS running on z/VM?...becuase of sharing resource? any shop running > >>> z/os on z/VM? > >> You don't need to run z/OS on VM. This is an option, IMHO rarely used in > >> "serious" production. > > > > Some people do, but it's far more common to see test/development systems running as guests. > > > >> Resource sharing? Well, I don't think so. Usually VM is used only as > >> hypervisor for Linux (VSE, z/OS), it rarely has data to share. > > > > Data isn't the only resource to be shared. Memory and CPU are equally important. To me, the biggest advantage of z/VM over LPARs in terms of resource sharing is that memory is allocated and used dynamically, not statically. Being able to fire up a new guest z/OS or z/VM or Linux, without having to do any work at the HMC, without having to have allocated reserved LPARs in advance, etc. is really, really nice. Other features, such as dynamically creating/destroying LANs and NICs and so on are why I've always called z/VM a "systems programmer's operating system." It just makes your life so much easier. >
And don't forget the ability to bring up 100 or 1000 z/Linux systems on 1 z/machine under 1 z/VM occupying only 1 LPAR. Kees. ********************************************************************** For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 ********************************************************************** ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
