vm1 - You know VMs. VMs, Datacenters (and bears, oh my!)...

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VMs, Datacenters (and bears, oh my!) 15-440 You know VMs. .. You used one for project 2! History: IBM sold big mainframe computers; companies would buy one; wanted to run apps designed for different OSes. When you can only afford one computer. .. Add a level of indirection! The Virtual Machine Monitor, or VMM VM/370 . .. in 1972. Yes, Fre had been discovered back then. So had computers. Hardware VMM OS A Hardware OS Apps Apps OS A A A VMM acts like an “OS for OSes” OS expects to run on hardware Interface mimics H/W Real HW interface Virtual HW interface App interface App interface App interface very different from h/w (But things like virtual memory similar. ..) Mem, CPU, registers, HD,. .. Re-emergence of VMs the PC took over: You could have your own computer . This was pretty revolutionary from the time-sharing days of old. But then. .. Compatibility (old app - old OS, how do you run it?) Many OSes, each with some advantages Enterprises:
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vm1 - You know VMs. VMs, Datacenters (and bears, oh my!)...

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