"In a distributed system, you can know where the work is done or you can know when the work is done but you can't know both." A simple thought experiment will

"In a distributed system, you can know where the work is done or you can know when the work is done but you can't know both." A simple thought experiment will quickly tell you that's not true. Given a task queue, the compute process that pulled the task and put a result could easily provide where and when and give you both.