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Emulab FAQ: Testbed Operations: What version of the OS does a previously swapped-in experiment use?

Emulab FAQ: Testbed Operations: What version of the OS does a previously swapped-in experiment use?

It uses the version that was current the first time it succeeded.

What we did wasn't clearly The Right Thing. But for Linux at least it was necessary. We have seen compatibility problems between RHL 7 and RHL 9. So if you had a swapped-out RHL-STD experiment and you swapped it in and got RHL 9 instead of 7, some of your application software (say in /proj) might suddenly not work.