rolf wroteI guess C will provide the best performance, but I have limited experience in C. Still would like to be in, hope that I have time though I'm starting full time.
what do you mean C? even winsock cannot support this kind of users online.
IOCP sockets can handle a lot but of course not 1 million.
Now of course you will never have 1million simultaneous sql request. This is the area that can be optimized and cached I guess.
In addition I am not sure they will give you access to run a C program
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btw the prizes are extremely not interesting for such a challenge and sponsors!