Mainframe

There is no infrastructure that can process a million transactions a second except the mainframe. Mainframes claim to fame is the fact that it can process transactions. The stuff has to be done on a single thread. Now you can use multiple threads if you're clever and you're tricky, but you just can't throw the workload on AWS as a process Bank of America's transact. They scale horizontally and they do so very beautifully. But when you talk about scaling in the cloud, where you're talking about more servers, more wiring, more cable, more space,. When the mainframe, you're just talking about adding a processor and keeping moving.

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