# OpenResty 技术图谱

## basic concepts

- HTTP

- RESTful API & API GateWay

- Microservice

- Domain Specific Language(DSL)

- C10K & C1M

- non-blocking & asynchronous I/O

- event loop

- I/O mutiplexing

- Streaming processing

- coroutine

- Test Driven Development(TDD)

## around tech stack

- MySQL

- Redis

- Kafka

- Docker

- KONG

- regex

## testing

- TDD & Unit Testing

- Test::Nginx

- curl & ab & wrk

## debugging

- debugging log

- core dump

- flame graph

- on-CPU & off-CPU

- nginx-systemtap-toolkit

- stapxx

- nginx-gdb-utils

## caching

- ngx.shared.DICT

- lua-resty-lrucache

- dog-pile effect

- lua-resty-lock

- lua-resty-shcache

- ngx_srcache

## NGINX

- log

- static file

- load balancer

- proxy

- phase

- tuning for performance

- if is evil

## LuaJIT

- Standard Lua

- JIT（Just-In-Time Compiler）

- NYI (Not Yet Implemented)

- ffi.\* API

- jit.\* Library

## ngx\_lua

- directives

- Nginx API for Lua(ngx.\*,tcpsock.\*,coroutine.\*)

- resty-core

- semaphore

- balancer\_by\_lua

- ssl\_certificate\_by\_lua

- cosocket TCP/UDP

- hot load lua code