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> Mainframes are all about VMs and containers. They just use different terminology and tech. Exactly. The tech is called LPAR: https://en.wikipedia.org/wiki/Lo
by chinathrow 9y ago
> Mainframes are all about VMs and containers. They just use different terminology and tech.
Exactly. The tech is called LPAR: https://en.wikipedia.org/wiki/Logical_partition https://en.wikipedia.org/wiki/Logical_partition
- Beltiras 9y agoEnglish Wikipedia link: https://en.wikipedia.org/wiki/Logical_partition https://en.wikipedia.org/wiki/Logical_partition
- relaxitup 9y agoDidn't realize Linux supported LPAR?
- dfox 9y agoLPARs are implemented on hardware/microcode level (some older implementations even involve actual physical switches in the CPU and IO buses for partitioning the system), so OS does not have to even know about it. The main feature of virtualization on zArchitecture are not LPARs, but the fact that that it meets the Popek and Goldberg virtualization requirements perfectly and thus there are no artificial limits on how deep you can nest the hypervisors. In fact even the process in z/OS can almost behave as if it was running directly on hardware.
- emersonrsantos 9y agoYou can do virtualization also using z/VM operating system, each user has its own VM. It still stores all the users password in plain text inside a DIRECTORY file that resides on the maintenance userids. I've seen it 100% of the time I did support on one of those systems.