Redis Build and install

1. Nosql&redis Introduction

Nosql,not only SQL, a non-relational database. Traditional relational database can not meet the application of ultra-large scale and high concurrency.

is stored in the form of key-value (for example, json,xml) and does not necessarily follow some of the basic requirements of traditional databases, such as SQL standard, ACID properties (atomicity/consistency/isolation/durability), Table structure and so on. The main features are: non-relational, step-by, open-source, horizontally extensible (refers to the ability to connect multiple hardware and software features).

NoSQL Application Scenarios:

1), high performance-highly concurrent read and write to data

2), Huge storage-efficient storage and access to massive amounts of data

3), HI scalability && highavailability-high scalability and high availability for data

Open source NoSQL database: Redis, MongoDB, Cassandra ...

Introduction to Redis

Redis is a key-value storage System. It supports stored value types such as:string(String),list(linked list), set(unordered collection), zset(sorted set ordered set), and hash , you can also think of Redis as a data structure server. These data types support pust/pop,add/remove , and intersection, set, and difference operations, and Redis supports sorting in a variety of different ways. The data is cached in memory , it can also periodically write the updated data to disk or write the modified operation to the appended record file , and implement the Master-slave (Master-slave) Synchronous.

The API languages provided by Redis include C, C + +, C #, Java, JavaScript, Lua, Objective-c, Perl, PHP, Python, Ruby, Go, Tcl, and more.

Using Redis: Sina Weibo, 200+ Server, Port 4G, data.

How to use: Same as Memcache

1. Application direct access to the Redis database;

2. Application direct access to Redis, only access to MySQL if access to Redis fails

Application:

1. Take the latest N data operation

2. Leaderboard Application

3. Applications that need to set the expiration time accurately

4. Counter Application

5. Uniq operation, get all data weight values for a certain period of time

6. Real-time system, anti-spam system

7. Pub/sub building a real-time messaging system

8. Build a queue system

9. Caching

10. Store Weibo attention relationship

Redis has a library without tables, no fields, no columns. MongoDB has a library with a collection (corresponding to the table in MySQL)

2. Installation of Redis

Official website: Http://redis.io

Step One:

To download the installation package:

wget http://redis.googlecode.com/files/redis-2.4.17.tar.gz

Step Two:

Compiling the source code:

TARZXVF redis-2.4.17.tar.gz

cdredis-2.4.17

Make

Cdsrc

Makeinstall

Note: When make is complete, there is an executable file generated

Redis-server:redis Server Start-up program

The Redis-cli:redis command-line tool can also be used for client

Redis-benchmark:redis Performance test Tool (read/write)

Redis-stat:redis Status Detection Tool (status parameter delay)

Step three: (not required)

Move files for easy management

Mkdir–p/usr/local/redis/bin

Mkdir–p/usr/local/redis/etc

MV Redis-2.4.17/redis.conf/usr/local/redis/etc

mvmkreleasehdr.sh redis-benchmark redis-check-aof redis-check-dump redis-cli redis-server/usr/lcoal/redis/bin

Step Four:

Start Redis Service

/usr/local/redis/bin/redis-server (with warning, no configuration file loaded)

/usr/local/redis/bin/redis-server/usr/local/redis/etc/redis.conf

The default connection port on the Redis server is 6379

Redis is not running in the background by default

Step Five:

Client connections

/usr/local/redis/bin/redis-cli

or other clients: such as Phpredis

[PHP]View Plaincopy print?

1. $redis = new Redis ();
2. $redis->connect ("127.0.0.1", 6379);

Step Six:

Stop Redis

/usr/local/redis/bin/redis-clishutdown

Or

Pkill Redis-server

3. Configuration of Redis

Daemonize If you need to run in the background, change the item to Yes

Pidfile Configure multiple PID addresses, default in/var/run/redis.pid

Bind bind IP, set only to accept requests from that IP

Port Listener, default = 6379

Timeout setting time-out for client connections in seconds

LogLevel is divided into 4 levels, debug, verbose, notice, warning

LogFile Configuring the log file address

Databases set the number of databases, the default database used is 0

Save sets the frequency with which Redis performs database mirroring, how often a snapshot is saved, how long the first * represents, and the third * indicates how many times the write operation is performed. Snapshots are automatically saved when a certain number of writes are performed within a certain amount of time. You can set multiple conditions.

Rdbcompression whether to compress during a mirrored backup

Dbfilename file name for image backup

Dir file placement path for database mirroring backup

Slaveof setting the database to a different database from the database

Masterauth password verification required for primary database connection

Requirepass setting the password to use when logging in

MaxClients limit the number of simultaneous customers

MaxMemory set the maximum memory that Redis can use

AppendOnly Open Append Only mode

Appendfsync Setting the frequency of synchronization for appendonly.aof files

vm-enabled whether virtual memory is supported

Vm-swap-file setting the swap file path for virtual memory

Vm-max-memory Setting the maximum physical memory size used by Redis

Vm-page-size setting the page size for virtual memory

Vm-pages set the total page number of the swap file

Vm-max-threads setting the number of simultaneous threads used by Vmio

GLUEOUTPUTBUF Store small output caches together

Hash-max-zipmap-entries setting the critical value of a hash

Activerehashing re-hash

Redis Build and install