RDMA Programming: Java vs. C

Hello everyone.

I'm a newcomer to the world of InfiniBand and RDMA.
I started to write small programs in C to leverage RDMA features in databases. I would like now to try out some of my ideas on
benchmarking tools which are mostly written in Java.
So I was thinking maybe I should migrate to java to void reinventing the wheel and ending up writing the whole benchmarks in C by myself.

So my questions are:

1- Is there any significant difference, performance-wise, between RDMA programming in Java and C?
2- I have read on some blogs that JDK has support for OFED 1.5. Is that true? I'm currently working with OFED 2.3.1, and really do not know which of the features I'm using are specific to this version. 3- Can you point me to a good starting point (libraries, ....) for Java RDMA programming. Even a small example would be great.

Thanks.

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