It is possible to configure Storage Arrays in the PC world to work under a very similar methodology as a DASD does in the mainframe world. It is very common in the Virtual environment. I don't know if all the different PC virtualization technologies can support it, but quite a few do, with some very intelligent methods for sharing files amongst different servers and workstations, and spawning off new individual versions when a file is changed for only a specific machine. The PC world is getting closer and closer to the mainframe world when virtual environments start being used heavily.
This is a bit more in depth than your average PC shop will get into, but not all that new in the PC world. Frank Finley -----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of McKown, John Sent: Monday, April 26, 2010 12:47 PM To: IBM-MAIN@bama.ua.edu Subject: Re: 25 reasons why hardware is still hot at IBM > -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:ibm-m...@bama.ua.edu] On Behalf Of Paul Gilmartin > Sent: Monday, April 26, 2010 12:14 PM > To: IBM-MAIN@bama.ua.edu > Subject: Re: 25 reasons why hardware is still hot at IBM > > On Mon, 26 Apr 2010 11:52:53 -0500, McKown, John wrote: > > > > I am totally certain (watch somebody prove me wrong) that > it is impossible to have "shared DASD" on a PC like we are used to. > > > Point of view. Think of a DASD control unit as a very dumb > fileserver. > Or a fileserver as a very smart control unit. > > Depends on whether you prefer to serialize on extent or on > file. Don't > deprecate software serialization; GRS and ISPF both do this to gain > performance and/or granularity over what RESERVE provides. > > -- gil I guess if you have a 10Gb Ethernet backbone, then that sort of "sharing" (via specialized "servers") would be useful. I would worry about LAN congestion. -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * (817)-961-6183 cell john.mck...@healthmarkets.com * www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets(r) is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance Company(r), Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
