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> virtualizing servers by factors in the hundreds Yeesh. The way I've heard it, this is due to a peculiar approach in mainframe development. Programs tend to a
by prodigal_erik 16y ago
> virtualizing servers by factors in the hundreds
Yeesh. The way I've heard it, this is due to a peculiar approach in mainframe development. Programs tend to assume isolated use of dedicated hardware, so they have to resort to creating ludicrous numbers of virtual mainframes rather than letting the programs coexist and interact within a single kernel.
- whatusername 16y ago"Programs tend to assume isolated use of dedicated hardware, so they have to resort to creating ludicrous numbers of virtual mainframes rather than letting the programs coexist" ----> Sounds like Windows VMWare/HyperV deployment justifications. :) There is a supposed higher security in zOS partitioning -- but I have no idea what EAL Levels really mean: http://en.wikipedia.org/wiki/Evaluation_Assurance_Level http://en.wikipedia.org/wiki/Evaluation_Assurance_Level
- jacques_chester 16y agoMainframes predate the concept of multiple programs running at the same time. Truly. z/OS can handle running multiple programs at the same time, but it's optimised for batch operations. If you want a multiprocessing OS, you can just use Linux on z/VM.