That's a nice capability, and for IBM to emulate that, there has to be a way to quickly migrate *hundreds* of instances off a z-series box, assuming there's another z-series system handy to take over the load. I believe on VMware you are still dealing with a dozen or two OS images per box, max. For a comparable feature on the the z, it would be nice to do hot CP/IFL and memory allocation switching via the HMC, as we can with DASD.
Ray Mrohs Energy Information Administration U.S. Department of Energy -----Original Message----- From: Lee Stewart [mailto:[EMAIL PROTECTED] Sent: Friday, December 10, 2004 2:19 PM To: [EMAIL PROTECTED] Subject: Re: VMware vs. VM For example: Over the weekend you're going to update your machine and turn on another IFL -- that requires the entire box VM, LPARs, servers to be shutdown for a POR/IML... Now a VMware Virtual Center (with V-Motion) example: I have to update my 4-way xSeries 445 to an 8-way, which requires the same type of hardware outage. And I have multiple VMware boxes in the shop, all controlled by Virtual Center. I can migrate the running Windows or Linux servers off the box I need to update, onto various other boxes while the update is being done, then back to the updated server -- all without ever taking the servers down. No outage from the customer or application point of view. All assuming you have the processor and memory capacity available to hold the workload on the other machines. (Keep in mind if you're running say 6 servers, those 6 could be moved to 6 different servers to spread the load.) It would be analogous to taking a running Linux user under VM and migrating it to another zSeries box on the fly without taking the Linux user down. VM and zSeries is good, but it can't do that -- at least yet. Lee At 11:57 AM 12/10/2004, you wrote: > > VMware can do things that VM can't... Imagine >taking a > running active server and dynamically >moving it to > another physical processor -- >never missing a beat. > > > >What type of scenerio would this be useful on zSeries >hardware? I thought IBM indicates it to have a mean >up time of 99.999%. > > >__________________________________________________ >Do You Yahoo!? >Tired of spam? Yahoo! Mail has the best spam protection around >http://mail.yahoo.com > >---------------------------------------------------------------------- >For LINUX-390 subscribe / signoff / archive access instructions, >send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit >http://www.marist.edu/htbin/wlvindex?LINUX-390 Lee Stewart, Senior SE Sirius Enterprise Systems Group (719) 566-0188 , Fax (309) 410-5363 [EMAIL PROTECTED] www.siriuscom.com ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
