redis database tutorial

A detailed description of the branch product of DBosql Database Introductionis a non-relational database service, it can solve the common database concurrency, such as traditional database IO and performance bottlenecks, as well as a relational database is a supplement, has

Redis is an open-source non-relational database. It is written in C language and is a key-value storage system. It stores many value types, including string ), Redis is an open-source non-relational database. It is written in C language and is a key-value storage system. It stores many value types, including string ),

() #关闭数据库连接======eg: Write the function of MySQL:Import Pymysqldef operationdb (host,user,passwd,port,db,sql,charset= ' UTF8 '): #传参Pymysql.connect (HOST=HOST,USER=USER,PASSWD=PASSWD, Port=port,db=db,charset=charset) #建立连接cur = conn.cursor (cursor=pymysql.cursors.dictcursor) #建立游标Cur.execute (SQL) #执行sql语句If Sql.startswith (' select '): #判断字符串是不是以什么开头Res=cur.fetchall () #判断如果是select语句, return the execution result directly, no commit.ElseConn.commit () #如果是insert Delete Update and other statemen

keys will not be exchanged, so if you have a large number of keys in your database, where each key is only associated with a small value, then this scenario is not ideal for using virtual memory. If, on the contrary, the database contains only a small number of keys, and each key is associated with a very large value, then this scenario is suitable for the use of virtual storage.In practical applications,

sub-table realization idea-1105th: Horizontal sub-table realization idea-1Section 106th: Horizontal sub-table code implementation-1Section 107th: Horizontal sub-table code implementation-2Section 108th: MySQL Fabric-1Section 109th: MySQL Fabric-2Section 110th: MySQL master-slave replicationSection 111th: Galera mysql cluster-1Section 112th: Galera mysql cluster-2Section 113th: Ha and load balancing for MySQLSection 114th: SQL Optimization methodSection 115th: MySQL server configuration optimiza

Label:This paper discusses the current situation and shortcomings of the existing Exchange conference Room application, and introduces the application of Redis memory database in Exchange room, gives a high-performance application architecture, adopts key technology and key realization process, and finally realizes greatly improving system performance and improving user experience. And it provides an effect

Redis Server went away When viewing the system log file, it is found that the error is thrown every day: PHP Fatal Error:Uncaught exception ' redisexception ' with message ' Redis server went away ' The script that throws the problem is a statistical script, need to read the previous day data and warehousing, initially thought to be redis read too frequently caus

basic operation of Redis database base 1, Introduction: The REDIS,K-V database can contain data types that have strings, hashes, lists, collections, and ordered collections. data types support Push/pop,add/remove, intersection, and set, the difference set and other operations generally

Tag:networking database databaselocal #!/bin/sh #author: Taokey #date: 2016-05-06 #chkconfig: 3458515 #description: redisisapersistentkey-valuedatabase #processname: redis-server #config: /etc/redis/6379.conf #config: /var/redis #pidfile: /var/ Redis/run/redis_6379.pid #Sou

stage, the follow-up is available we can wait and see.Redis Persistent disk IO mode and the problems it bringsPeople who have experience with Redis on-line operations will find that Redis has a lot of physical memory usage, but it has not exceeded the actual physical memory of the total capacity of the instability or even crash, some people think that is based on the snapshot persistence of the fork system

from the current technical point of view.1. Install the Redis database. Download the installation package to the official website.http://redis.io/here should be 2.6.10 version.$tar-XZVF redis-2.6.10.tar.gz$CD redis-2.6.10$make$make InstallOK now you can test it with Redis's own client.Run

to be too big, therefore redis supports bgrewriteaof instruction, to appendonly.aof reorganization. Other parameters: MaxClients 10000: Maximum number of client links slaveof Requirepass Password: Authorization password for current server Masterauth Vm-enabled Yes:redis is a memory database that cannot receive new write requests when memory is full, so support for virtual memory is provided after r

To/dev/null # logging way logfile Stdou t # Set the number of databases. The default database is DB 0, your can select # a different one on a per-connection basis using select Four, start Redis server Use the command to start the Redis server. Redis-server.exe conf/redis.conf After the startup is successful, y

Delete key in bulkThere is a command DEL that removes a single key in Redis, but it seems there is no instruction to delete the key in bulk, but we can do this with the Linux xargs command.REDIS-CLI Keys "*" | Xargs redis-cli del // If REDIS-CLI is not set as a system variable, you need to specify the full path of the REDIS