How long a V-Motion migration takes depends on how big the virtual server is (all the memory contents have to be moved to the new physical server, usually over a dedicated gigabit ethernet connection. I've seen a migration take only a few minutes. There's no slow down during the migration. And some of their demos have been using streaming video with either no interruption, or at most a one second pause at the moment of changing processors, then continuing...
I still love VM and have for decades. But VMware is pretty spiff too. And both have their place.
Lee
At 12:31 PM 12/10/2004, you wrote:
> -----Original Message----- > From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On > Behalf Of Lee Stewart > Sent: Friday, December 10, 2004 1:19 PM > To: [EMAIL PROTECTED] > Subject: Re: VMware vs. VM > >
<snip>
> > 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.)
How long does this take? Is there any slow down noticable during the migration?
> > 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 >
-- John McKown Senior Systems Programmer UICI Insurance Center Information Technology
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