Re: Virtualization preferences

["Matt Shields-4" <user=23@nabble.blu.org>]

 On Sat, Jul 26, 2008 at 10:17 AM, Jerry Feldman <[hidden email]> wrote: 

> On Sat, 26 Jul 2008 08:51:40 -0400 
> Kent Borg <[hidden email]> wrote: 
> 
> > Jerry Feldman wrote: 
> > > I think the future of computing will be leaning very heavily on 
> > > virtualization. 
> > 
> > And isn't that strange.  Isn't this an indication of major failure in 
> > operating system design? 
> > 
> > I remember when computers were sometimes nearly naked hardware.  The 
> > idea of having a real OS sounded so good, it would let multiple programs 
> > run and isolate them from each other.  Time passes, and I am a Linux 
> > user.  I know a fair amount about it, and it can run tons of different 
> > programs at once...yet I run Linux guests on top of Linux hosts.  And 
> > others do that too. 
> 
> Back in the 1970s, I ran an IBM data center with VM370 and OS/VS1 as 
> the guest production OS. On an unintentional benchmark, we had to rerun 
> payroll. The first night we ran it with OS/VS1 as the native OS, and 
> the second night ran it under VM370 with online CMS users. (CMS was a 
> single user OS used by our developers).  We got better throughput on 
> OS/VS1 under VM370 than native. I am also aware of a few other 
> companies who achieved much better throughput using DOS (IBM's 
> mainframe DOS). But, both of these cases were a result of bottlenecks 
> in the OS that were alleviated by VM. 
> 
> The reason I think that virtualization will be the way to go in the 
> data center is flexibility. Hardware is constantly evolving to become 
> faster, more memory, and smaller.  While there will always be some 
> legacy systems, the ability of the vurtualization systems to 
> reconfigure dynamically over multiple machines gives the data center 
> people the capability to remove the physical boundaries, and also the 
> ability to bring new hardware into the mix without shutting down.  I 
> think that one of the talks planned for the event will be on this 
> feature. 
> 
> -- 
> -- 
> Jerry Feldman <[hidden email]> 
> Boston Linux and Unix 
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