Advanced Networking processing

gistfile1.txt

https://programming.vip/docs/java-non-blocking-io-and-asynchronous-io.html

Differentiation into
Blocking mode IO (Single thread)
-> Often standard
Asychrnous blocking IO
-> many thready only waiting
-> spawn a new thread for every blocking call
Non-blocking IO
-> single-thread can select over multiple connection and get notified on changes
=> Java Selector call
-> worker can process changes
   => worker can be minimal only used for processing
   => less CPU overhead (thread creating + context switch between threads) 
   => less memory overhead (holding cpu threads)
=> Java AsynchronousFileChannel / AsynchronousSocketChannel or similar
=> Linux: event system epoll used for networking - POSIX forbids it for files
=> Windows: networking + files