----- Original Message ----- From: "Ted MacNEIL" <[EMAIL PROTECTED]> Newsgroups: bit.listserv.ibm-main To: <[email protected]> Sent: Friday, July 20, 2007 2:52 PM Subject: Re: PSI MIPS (was: Links to decent 'why the mainframe thrives' article)
> >x86 processor performance has increased at roughly twice the rate as mainframe processor performance. > > Yes, but. > We run mainframes at 100%. > We run wintels at under 20%. > I know this is not a good comparison, but...I am reminded of a SHARE session I attended many years ago about TCP/IP. I don't recall all of the details, but it went something like this: The networking/communication folks from IBM were giving a session, and started talking about how IBM had once upon a time insisted that more efficient networks were simply better. SNA and Token Ring were *soooo* much more efficient, and could run at 100% utilization, while Ethernet started getting performance problems at a mere 40%. What they realized eventually, was that the performance improvements in Ethernet were happening so fast, and that the technology was so cheap - that Ethernet and TCP/IP were going to kill SNA and Token Ring. They realized that IBM had great technology, but lost the war because they failed to consider the economics of it. As you can see, SNA and Token Ring are no more. I hope that this lesson has not been lost on IBM... Regards, Dean > > - > Too busy driving to stop for gas! > > ---------------------------------------------------------------------- > 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 ---------------------------------------------------------------------- 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
