The more I look at AWS and the more I cannot understand how IBM missed the opportunity of using massive zSeries installs with Linux LPARs for cloud computing. All the I/O, security, etc. problems had already been solved. CloudHSM? Ha, z15-TO1 & friends, I/O? Ha… mainframe!
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I’m talking z/VM and LPARs in which you run Linux, z/OS is something different. Breaking that is more interesting from a rewards perspective… z/OS tools almost certainly have a gazillion vulnerabilities like anything Linux, Windows, macOS. The underlying hardware is better.
Better in what way? z/Series had all the same standard speculation vulns as AMD https://www.phoronix.com/scan.php?page=news_item&px=S390-Expoline-Linux-4.16 … (Intel is worse, but we've already established Intel are idiots when it comes to security; use literally anything else, doesn't have to be a mainframe).
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The architecture is designed around I/O, it isn’t an afterthought of subsequent layers of attempts at making it fast. The CPU suffers from the same problems which plague every single processor which need to speed up and went speculative. They all do.
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Okay but I was talking about security, not I/O :-) Yes, mainframes do particularly well on transactional I/O bound workloads, but that's not most of what people do on AWS.
End of conversation
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