I have a multiple instance deployment backed by a single database. I have a 
user-triggered event that creates a JobSandbox entry that is to execute a week 
in the future. Is it (reasonably) guaranteed that the job will only be executed 
by a single instance? It would be bad for our customers if the job is executed 
by more than one of the instances.

Can anyone shed some light on what mechanism is responsible for ensuring that 
only one runtime instance will execute a certain job?

Thanks

-craig

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