======= TCP/IP =======

  * 반응속도 개선
    * [[https://meetup.toast.com/posts/53|리눅스 서버의 TCP 네트워크 성능을 결정짓는 커널 파라미터 이야기]]
    * http://cyberrodent.com/blog/blog/page/2/
    * https://serverfault.com/questions/623780/low-latency-tcp-settings-on-ubuntu
    * [[https://ssambback.tistory.com/entry/%ED%8A%9C%EB%8B%9D%EC%9D%84-%EC%9C%84%ED%95%9C-%EB%A6%AC%EB%88%85%EC%8A%A4-%EC%BB%A4%EB%84%90-%ED%8C%8C%EB%9D%BC%EB%A9%94%ED%84%B0%EB%93%A4|튜닝을 위한 리눅스 커널 파라미터들]]
    * https://m.blog.naver.com/PostView.nhn?blogId=jesstter&logNo=220800312738&proxyReferer=https:%2F%2Fwww.google.com%2F
    * [[https://threadbuilder.wordpress.com/2013/02/19/linux-%EC%86%8C%EC%BC%93-%EC%84%B1%EB%8A%A5-%ED%96%A5%EC%83%81/|linux 소켓 성능 향상]]
    * https://www.open-mpi.org/faq/?category=tcp