Differences between InfiniBand Vapi and IP over Ib

Source: Internet
Author: User
The InfiniBand Device of silverstorm supports two communication protocols: IB native. During mpich compilation, device = Vapi is specified during configure; one method is IP over Ib. During mpich compilation, device is Ethernet, because the above processes IP and TCP.

Therefore, it is clear that the performance of InfiniBand can only be achieved through IB Native Communication. Otherwise, it cannot be realized. That is to say, if all parallel applications use mpich over Ib, they will certainly be able to run (without having to talk about the mpich application, we need to analyze specific issues ), however, the performance must be compromised. If you use the IB native method, the performance is definitely the best.

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