UNIX Domain Socket

UNIX Domain Socket 简称 UDS，又叫 IPC Socket。是一种进程间通信的方法。

UDS 是 POSIX 操作系统的标准组件。

三种类型：

• SOCK_STREAM (compare to TCP) – for a stream-oriented socket
• SOCK_DGRAM (compare to UDP) – for a datagram-oriented socket that preserves message boundaries (as on most UNIX implementations, UNIX domain datagram sockets are always reliable and don’t reorder datagrams)
• SOCK_SEQPACKET (compare to SCTP) – for a sequenced-packet socket that is connection-oriented, preserves message boundaries, and delivers messages in the order that they were sent

看这篇文章 的 Benchmarking UDS compared to loop-back TCP sockets。

unix domain sockets vs. internet sockets