What is hyperband_iterations and how can I estimate total search time?

[muaz-asr]

I am trying to search optimal parameters using Hyperband. I see it says it is recommended to set hyperband_iterations as high as possible. But what is the upper limit to this parameter? And what is the ideal/practical value to start with? Is hyperband_iterations is s_max from the paper?

Also, is there any way that I can estimate the total search time if I know per epoch time and the _number of configurations?

I would really appreciate the comments. Thank you.