Any good async (if possible, also pipeline based) Networking libraries for C++ on Linux? I want to create a small Server which should be able to handle a big amount of TCP connections (~500) at the same time, using threadpools maybe, something like Netty for Java would be the best.

the only thing i know that is designed to handle millions of concurrent network connections would be Elixir based on Erlang.

(Erlang was designed by ericson for cellphone antennas)

It's obviously not c++ but maybe it's what you need?

Webframework
https://phoenixframework.org/

Wikipedia - Elixir Language
https://en.wikipedia.org/wiki/...

I don’t do c++ but look after libevent or libevent vs ..... search suggestions
Ex. https://kukuruku.co/post/...

have you tried https://github.com/Qihoo360/evpp

@heyheni he asked for 500 not millions
Don't overengineer

Well, nginx itself works nicely with that amount of connections, but if you want to have one program to do everything, including handing the connections, erlang / elixir is a great idea. Or just java :D

I throw in QtNetwork. 😈

boost asio

Okay, jokes aside, there are also:

* Asynchronous Network Library

http://asio.sourceforge.net/

* Adaptive Communication Patterns Library

http://libassa.sourceforge.net/

* Ccnet (framework for writing networked applications in C)

https://github.com/haiwen/ccnet

* nacl (high-speed software library for network communication)

http://nacl.cr.yp.to/

* net6 (Network access framework for IPv4/IPv6 written in C++)

http://gobby.0x539.de/

* wvstreams (network programming library in C++)

https://github.com/apenwarr/...

This list comes from a swift and brief search. I do not know which of those, if any, suits your needs, but they are worth a look anyway. ;-)

Nanomsg nextgen is what you are looking for. Socket based and handles all common messaging patterns. Just read the feature list on the GH page.
https://github.com/nanomsg/nng