cfmpub...@ns.sympatico.ca (Clark Morris) writes: > How much work can that z196 do compared with the 4829/hr Amazon cloud > you mentioned? Given the great disparity between costs per > instruction execution, on reading these posts it would seem that > getting to a secure, fault tolerant operating system on blade clusters > would be highly cost effective and that all new work should be moved > to that environment.
re: http://www.garlic.com/~lynn/2012l.html#51 Turn Off Another Light - Univ. of Tennessee http://www.garlic.com/~lynn/2012l.html#56 Turn Off Another Light - Univ. of Tennessee this is long-winded discussion in (linkedin) Greater IBM regarding financial industry spending several billions on attempting to move business critical applications off mainframes to "killer micros" in the 90s (contributed to lots of the press about mainframe death). The efforts failed disastrously for some specific reasons. More than a decade later ... when all of the reasons for the earlier failures had been addressed ... there was still significant resistance and risk adversion lingering because of the earlier failures. http://www.garlic.com/~lynn/2012l.html#47 I.B.M. Mainframe Evolves to Serve the Digital World also repeated in this ibm-main thread http://www.garlic.com/~lynn/2012l.html#31 X86 server for something totally different ... in the 70s, one of the online virtual machine based commercial service bureaus (claims that these virtual machine based services were the cloud of the 60s&70s and into the 80s) ... developed a "capability-based" operating system for ibm mainframe called gnosis. It was benchmarked doing ACP/TPF like transaction at higher-throughput than ACP/TPF (on the same hardware) ... part of the explanation was the higher integrity, higher abstraction ... allowed things that couldn't be done with the low-level ACP/TPF implementation. When M/D bought the business in the 80s, the capability-based operating system was spun-off into its own company (disclaimer: I was brought in to audit the implementation as part of the spin-off). this has original background and history http://www.cis.upenn.edu/~KeyKOS/Gnosis/Gnosis.html it was spun-off as keykos http://www.cis.upenn.edu/~KeyKOS/ more recently gnosis/keykos work has been the basis for non-mainframe capability based system http://www.capros.org/ but there is significant difficulty getting market penetration and commercial acceptance. -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
