High performance practical Alibaba sentinel notes, in-depth restoration of Alibaba micro service high concurrency scheme

Preface

Sentinel Easy to use 、 Flexible configuration , Can be Sentinel The dynamic data source interface of is used in combination with the configuration center , Dynamically change traffic rules .Sentinel The flow control function provided is limited 、 Fuse 、 System adaptation 、 Authorization, etc . At that time, the author used fusing and system self-adaptive functions to deal with the service avalanche caused by sudden increase of flow , At the same time, the current limiting function is used in combination with semaphore isolation 、 Constant speed current limiting effect controller , To solve the problem that internal scheduled tasks call a service interface instantaneously and concurrently .

Features of this book

This book uses “ Concept 、 Core class 、 The overall workflow 、 Core functions ” Main context , System 、 Be comprehensive to Sentinel The source code of is analyzed , This paper introduces in detail the Sentinel Some obscure concepts and data structures of , The uniform velocity current limiting algorithm is explained 、 Cold start current limiting algorithm and Sentinel Code implementation of , And analyzed Sentinel Why some of the code in is written in this way , Figure out the design idea behind the code .

Learn more about Sentinel, Escort for micro service !

Step by step ~~~ Concepts and core classes 、 The overall workflow 、 Indicator data collection 、 Traffic management

thorough ~~~ The sliding window 、 Cold start 、 Uniform velocity queue 、 Fuse

Case study ~~~ Extension to achieve switch degradation 、 adapter Spring Cloud Dynamic configuration 、 Indicator data persistence

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Directory listing

This book is divided into 14 Chapter , The knowledge covered mainly includes : Basic concepts such as current limiting and fusing 、Sentinel Pressure test of characteristics and performance ,Sentinel Concept 、 Core classes and data structures ,Sentinel The overall workflow , Resource index data statistics , Current limiting and flow effect control , Fuse degradation and fuse , Authorization and system adaptation , Expand Sentinel Realize switch degradation ,Sentinel Dynamic data sources ,Sentinel Adapt to the implementation principle of the mainstream framework , Hot spot parameter current limiting , Cluster current limiting , Asynchronous call chain support , Collection and persistence of resource indicator data .

The first 1 Chapter two basic knowledge

The first 2 Chapter understanding concepts and core classes

The first 3 Chapter understand the overall workflow

The first 4 Chapter resource index data statistics

The first 5 Zhangrestrictor current

The first 6 Chapter fuse degradation

The first 7 Chapter authorization and system adaptation

The first 8 Chapter 4 realize switch degradation

The first 9 Chapter dynamic data source

The first 10 Chapter adaptation to mainstream frameworks

The first 11 Chapter hot spot parameter current limiting

The first 12 Chapter cluster current limiting

The first 13 Chapter different steps with chain support

The first 14 Chapter Sentinel Dashboard

summary

Sentinel As a front-end traffic control tool for microservices , In terms of ensuring the stability of microservices , Its importance is self-evident . This book not only explains Sentinel The framework and mechanism of , At the same time, its application in practical engineering projects is given , It also explains its advanced features in simple terms , It is suitable for practitioners engaged in micro service development and operation and maintenance .

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