Hi Joshua, Thank you very much for your help. I reply the email so late because I wanted to confirm the provided solution with MXM before that. However, unfortunately, I haven't used MXM correctly so far (two servers cannot communicate with MXM). I'll tell you if MXM solves the problem after I find a solution to the above problem. But currently, I think your solution is right because ib_read_bw also gets a bandwidth limit.
Thanks, Zhaogeng -- Thanks Zhaogeng
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