Redis initial

Redis acquaintance

What is Redis

• Open source
• Key-Value storage service system based on
• Multiple data structures (string, hash, list, set, sorted set)
• High-performance, feature-rich

Review the characteristics of Redis

• Fast 10w OPS
  • Data stored in the memory
  • C language (50000line)
  • Single-threaded threading model
• Persistence (do not throw off data)
• A variety of data structures
  • BitMaps Bitmap
  • HyperLogLog ultra-small memory count unique values
  • GEO locate address information
• Support for multiple programming languages
  • java
  • php
  • python
  • ruby
  • take
  • nodejs
• Feature-rich
  • Publish and subscribe
  • Lua script
  • Simple transaction
  • Concurrent improve pipeline efficiency
• simple
  • Dependent on external libraries
  • Single-threaded model
• Master-slave replication
  • Primary server
    • From the server
    • From the server
    • From the server
• High-availability, distributed
  • redis-sentinel support high availability
  • redis-cluster support distributed

Redis typical usage scenarios

• Caching System
  • app server --> cache --> Storage
• Single-threaded counter
  • Microblogging forwarding number
  • Reviews
• Message queuing system
• Leaderboard
  • Ordered set
• Social network
  • Number of fans
  • Number of concern
• Real-Time Systems
  • Spam filtering