![]() Mainframe operating systems, including Linux, have special hardware instructions for squeezing out every bit of performance. For example, you can allocate CPUs and memory in all kinds of ways for different workloads. Mainframe hardware is very robust, with lots of redundancy and configurability. A fully tricked-out zEnterprise system can execute 50 billion instructions per second (BIPS) and run 100,000 virtual machines. ![]() They have giant numbers of dedicated channels and super-fast switching for serving thousands of simultaneous transactions. Mainframes process vast amounts of data 24x7x365, and can run near 100 percent capacity without performance degradation because they are built with massive I/O. Or, you can run mainframe Linux on your Linux PC with the Hercules project.īut why would you want a mainframe in the first place? What makes them special? Three things: That’s one of the smaller, less expensive mainframes Linux powers the big ones too if you feel like splurging. That’s right, you can plunk down $75k for an IBM zEnterprise 114 mainframe and run Linux natively on it. Red Hat and SUSE Enterprise Linux both have mainframe editions. ![]() IBM has invested boatloads of money in building enterprise and mainframe Linux product lines.
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