re: http://www.garlic.com/~lynn/2010g.html#11 Mainframe Executive article on the death of tape http://www.garlic.com/~lynn/2010g.html#22 Mainframe Executive article on the death of tape
i don't remember for sure ... but i don't think that boeing ever got stc 3mbyte/sec 2byte interface working on 3033s. recent channel discussions http://www.garlic.com/~lynn/2010e.html#27 SHAREWARE at Its Finest http://www.garlic.com/~lynn/2010e.html#30 SHAREWARE at Its Finest http://www.garlic.com/~lynn/2010e.html#36 What was old is new again (water chilled) including this old email in above post: http://www.garlic.com/~lynn/2010e.html#email810617 303x channel directors were really 370/158s with only the integrated channel microcode and w/o the 370 microcode. i have recollection of 370/158 shooting hardware problems with 2305 1.5mbyte/sec where channel cable lengths starting getting much over 20-30 ft. 3mbyte/sec 2305s were pretty much 370/168 attachments (because of the faster channels). re: http://www.garlic.com/~lynn/2010g.html#email800710 so the "floor space" issue in the referenced email ... wasn't necessarily total datacenter floor space ... but floor space within the more limited channel cable length for 2305 1.5mbyte transfers. re: http://www.garlic.com/~lynn/2010g.html#email800804 the other reference to higher paging rates and compute intensive ... trivial interactive workloads have always tended to be dominated by paging latency (and cpu overhead to do page transfers). If an environment that was running 100% cpu utilization ... doing faster paging would tend to reduce interactive response, increase total interactive thruput, increase paging rate, and increase paging related cpu use (it isn't strictly doing less work ... it is shifting some of the work from the more compute intensive workload to the more interactive intensive workload). -- 42yrs virtualization experience (since Jan68), online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
