Thank you for your reply!
Actually, the thing I'm doing now is that I want to see how many OpenMPI jobs can be handled in one computer at the same ...
That is a simple question to answer. If you don't care about performance, the number is limited solely by the OS limit on the number of open file descriptors you are allowed to have.
So I'm trying to figure out the reason of the problem that I meet now.
It seems that it's not the limit of OpenMPI, and the real reason is my computer can't handle a huge amount of connection in a short time.
Is that right?
Running it the way you are, yes - you're simply overwhelming the ssh system.
Thank you very much again!!
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