We have 2700 machines using a single Salt master. You have to tune it or you have the "thundering herd" problem. There are two parameters if I recall: * a del

We have 2700 machines using a single Salt master. You have to tune it or you have the "thundering herd" problem. There are two parameters if I recall: * a delay between master queries. * randomization of when to check with the master. You have to get pretty liberal with these values to scale out, but I assure you, it does work.