Redis6 1: what problems can be solved by the introduction of NoSQL and redis?

Redis6

NoSQL Database introduction

1. Technology development

The classification of Technology
1、 Solve functional problems ：Java、Jsp、RDBMS、Tomcat、HTML、Linux、JDBC、SVN
2、 Solve the problem of scalability ：Struts、Spring、SpringMVC、Hibernate、Mybatis
3、 Solve performance problems ：NoSQL、Java Threads 、Hadoop、Nginx、MQ、ElasticSearch

1.1 Web1.0 Time

Web1.0 Era , Data access is limited , Most problems can be solved by using a single point server with high performance .

1.2 Web2.0 Time

​ With Web2.0 The coming of the era of , The number of user visits has increased significantly , At the same time, a large amount of user data is generated . Coupled with the popularity of smart mobile devices later , All Internet platforms face huge performance challenges .

1.3 Redis solve CPU And memory pressure

session problem ：
Use multiple servers , Will exist session Storage issues for
session Where it exists ？

• programme 1： There is cookie in unsafe 、 The network burden is inefficient

• programme 2： Stored in a file server or database a large number of IO Low efficiency

• programme 3：session Copy session data redundancy , More nodes , The greater the waste

• programme 4：Redis Cache database Completely in memory , Fast , The data structure is simple

1.4 Redis solve IO pressure

author ： The programmer GQ

Game programming , A game development favorite ~

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