Question Running 60+ Remote Ubuntu From Unity

Hi all, I'm not expert so my expression could be ambiguous.

I'm trying to running 60+ Ubuntu machine connected by 10Gbps ethernet in Unity with 28 cores.
So I made a task using SSH.NET like this. (Each task takes 5+ min)

Code (CSharp):

1. class UbuntuWorker
2. {
3.    async Task Work()
4.    {
5.        client.Connect();
6.        cmd = GetNextJob();
7.        cmd.BeginExcute();
8.        while(!cmd.IsCompleted)
9.            await Task.Delay(3000);
10.        result = cmd.EndExecute(cmd);
11.        SaveResult(result);
12.        client.Disconnect();
13.    }
14.    public void GoWork()
15.    {
16.        task = Task.Run(() => Work());
17.    }
18. }
19. List<UbuntuWorker> workers = new List<UbuntuWorker>();
20. List<string> jobs = new List<string>();
21. LoadWorkers(workers);
22. LoadJobs(jobs);
23. foreach (var worker in workers)
24.    worker.GoWork();
25. while (jobs.Count() != 0)
26. {
27.    foreach (var worker in workers)
28.        if (worker.hasCompleted)
29.            worker.GoWork();
30.        else
31.            await Task.Delay(300);
32. }  // These are not exact code but simplified.

Then I made 60+ tasks during runtime and of course, I'm suffering from massive fps drop and freezing.
I learned that it's bad design that using task more than cores, but I have to run machines as much as possible at the same time...

Q1. I'm actually new to TPL. In this case, How should I design my code?

Q2. Keeping 60+ connection using SSH.NET is also costly a bit. Is there an alternative approach, for example keeping process after disconnect and check it after 5 min?

 

I solved this my own. answer is https://stackoverflow.com/a/65887283/15053077