Murphy... you show how clueless you are about hipervisors such as z/vm, zen, vmware. They are about sharing resources when you have a REASON(technical or political) for keeping systems separate. z/os is far more advanced about running divergent workloads together on the same OS, than the UNIX systems(can Solaris sharing the same disk drives(not splitting the disk drives), sharing memory(not splitting memory) with separate machines..out of the box, good luck). So tell us WHY most z/vm shops(90+%) would run z/os underneath it... many for 20+ years.
Here are the reason's why hipervisors packages are so popular with everyone but you...
1) to avoid a costly and untimely integration ... How much does it cost in labor for someone in your world to go through 2000000 lines of code to make sure there isn't a naming conflict or resource conflict... How about if an application is running on a downlevel OS. Testing in COMBAT at 2am, when an application MUST be up at 3am,during a merge... is not acceptable to most responsible shops.
2) merging divergent workloads.... How does your flavor of UNIX integrate a z/os workload or a Windows workload... not very well, I would imagine... How about when you have a 3 hour migration window?
3) now for some political aspects... How do you keep your system programmer/security administrator from accessing your previously secure(from them) payroll system. How do you keep one set of programmers with equal authority from accessing one anothers application systems.... How about if divisions(or the CEO) want to keep their workloads separate for a reason... Billing... to spin off a division... or future physical migration to another location...
After you think about this... now do it with little to no labor costs...
Oh... and by the way... guess what, Oracle is moving towards virtualization/consolidation,too. They announced it last week. How does your ideal of running a lone wolf separate system at a remote site, align with their statement of direction.
Sort of hard to consolidate Oracle(err..Sun) equipment and align with Oracle's vision of how Oracle(err..Sun) equipment should be run, when people like you, don't want to run equipment in a centralized location.
http://www.zdnet.com/blog/btl/oracle-preps-virtualization-strategy/38151?tag=content;search-results-river
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