Linux Enterprise-redis database, cache and message middleware

I. Introduction to Redis

Redis is an open-source (BSD-licensed), in-memory data structure storage system that can be used as a database, cache, and message middleware. It supports multiple types of data structures such as string (strings), hash (hashes), list (lists), set (sets), ordered set (sorted sets) with Range query, bitmaps, h    Yperloglogs and geo-spatial (geospatial) Index RADIUS query. Redis has built-in replication (replication), LUA scripting (LUA scripting), LRU driver events (LRU eviction), transactions (transactions), and different levels of disk persistence (Persistenc e) and provides high availability via Redis Sentinel (Sentinel) and automatic Partitioning (Cluster) (Hi availability)

Two. Installing Redis

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2. Start Redis

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Three. Installing Redis

Bind full Network Segment

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Enter Redis to create data

Data is a memory snapshot, saved to/var/lib/redis, in the form of an RDB

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four. Install Redis in Server2 and Server3, test data Synchronization

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Can view data synchronization to Server2 and Server3

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Five.Redis Sentinel

The Redis Sentinel (Sentinel) system is used to manage multiple Redis servers that perform the following three tasks:

· Monitoring (monitoring): Sentinel (Sentinel) constantly checks to see if your master and slave are functioning properly.

reminder ( Notification) :

· automatic failover (Automatic failover): Sentinel (Sentinel) starts an automatic failover operation when a master does not function properly. It upgrades one of the slave of the failed master to the new master, and the other slave of the failed master to replicate the new master, and when the client tries to connect to the failed master, the cluster also returns the address of the new master to the client. Enables the cluster to use master instead of fail master.

1. Configure Sentinel Sentinel files in Server1

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Server1, Server2 and Server3 are the main

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2. Pass the sentinel.conf file to Server2 and Server3

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3.server1, Server2, Server3 start Sentinel

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4. After shutdown,30s the Server1 Master node, view master switch to Server2 on Server3

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4. Reboot to change the major in Server1 's sentinel.conf file to Server2

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Linux Enterprise-redis database, cache and message middleware