Shuffle data among servers in sync or async.
mkdir build && cd build
cmake -DOPENSSL_ROOT_DIR=/usr/local/opt/openssl .. && make -j4
mkdir build && cd build
cmake && make -j4
./ASRreceiver 172.16.5.85 50000 1
./ASRsender 2 172.16.5.59 50000 172.16.5.81 50000 10
`` protoc -I ../protos --grpc_out=. --plugin=protoc-gen-grpc=which grpc_cpp_plugin
../protos/exchange.proto
protoc -I ../protos --cpp_out=. ../protos/exchange.proto``