Four Facts Millennials Need to Know About the Mainframe (2014)

&quot;Since mainframe computers are almost always running at 100% utilization...&quot;<p>That&#x27;s essentially impossible, as either CPU or I&#x2F;O will bottleneck first and be the limiting factor.<p>As an operator, I used to make note of how different jobs used resources so I could keep overall utilization as high as possible, blending I&#x2F;O bound jobs with CPU heavy jobs. (This was graveyard shift, where real-time users were few)<p>There was a great Boole and Babbage product called Resolve that allowed the operator (or a TSO user) to dynamically change job priorities as desired.

&quot;Mainframes provide the lowest cost of ownership. First the efficient mainframe power and cooling requirements are much cheaper than equivalent distributed UNIX or Windows platforms.&quot;<p>This makes no sense to me at all. For decades, you could have far lower $&#x2F;MIPS using minis and micros. Simply needing the whole raised-floor, halon-protected environment and custom peripherals (and specialized personnel) seems cost-prohibitive if not needed from a legacy standpoint.

Dave Beulke&#x27;s boss walks into his office, throwing a stack of market research papers on his desk.<p>&quot;What&#x27;s th-?&quot;, Dave starts, but is cut off.<p>&quot;MILLENNIALS MILLENNIALS MILLENNIALS&quot;, his boss replies, and is gone without another word.<p><a href="http:&#x2F;&#x2F;enterprisesystemsmedia.com&#x2F;article&#x2F;three-more-reasons-why-millennials-benefit-from-engaging-with-the-mainframe" rel="nofollow">http:&#x2F;&#x2F;enterprisesystemsmedia.com&#x2F;article&#x2F;three-more-reasons...</a>