Start jobs in their own processes

[mimir-d]

Issue by rjoleary Saturday Mar 07, 2020 at 02:41 GMT Originally opened as https://github.com/facebookincubator/contest/issues/71

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Each jobs has its own process. This has the following benefits:

• Failure isolation: If a test panics unexpectedly (for example it runs out of memory), only that test is affected and not the whole system.
• Cancel jobs: Allow jobs to be force cancelled simply by killing the process.
• Resource limits: Each job can have its own limits on memory, fds, cpu, etc...