title: Is there a way to specify a minimum number of workers for Cloud Dataflow w/ autoscaling?
body: <p>I'd like to specify a minimum number of workers for my job that autoscaling will not go below (akin to how it works for <code>max_num_workers</code>). Is this possible? My reason is that sometimes the worker startup takes long enough that the autoscaling decides to drop the number of workers to one, even though doing so is not optimal for my job. I'd still like to use autoscaling in case the job is larger than my estimated minimum.</p>