What are the characteristics of zabbix-server program

This article mainly explains "zabbix-server program has what characteristics", the explanation content in the article is simple and clear, easy to learn and understand, please follow the small series of ideas slowly in-depth, together to study and learn "zabbix-server program has what characteristics" bar!

A little look at the logic of the zabbix-server program has the following characteristics:

Macros are heavily used in zabbix programs to pre-define method names, variable names, etc.

zabbix does not use pthread_create to create threads, but instead uses fork to create processes when threads use

zabbix-agent also doesn't use pthread_create for threading

Question:

zabbix why not use pthread_create lightweight thread to handle, collection scheduling

Why zabbix doesn't consider libevent to handle Io requests based on event mechanism (event-based callback is one of the more common methods used by servers when facing concurrency problems)

Simple timing diagram analysis of zabbix-server function call

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