Redis

The Windows version of Redis allocates a memory mapped heap for sharing with the forked process used for persistence operations. In order to share this memory, Windows allocates from the system paging file a portion equal to the size of the Redis

DEL key [key ...] deletes the given one or more key spaces separately.EXISTS phone to determine if key existsEXPIRE Cache_page 30 # Set the expiration time to 30 secondsTTL cache_page # View remaining live timeMove song 1 moves song to database

Due to the use of Kestrelin the previous period, at the same time to operate Memcached timely update the cache, but also operate database, persistent data. It looks like Redis can be both a Cache and a Queue! So, start studying Redistoday!I. Brief

1. Installationwget http://download.redis.io/releases/redis-3.2.3.tar.gzCompile and install:Tar XF redis-3.2.3.tar.gzcd redis-3.2.3make && make installConfiguration:mkdir/etc/Redis Setup configuration file storage directoryCP-A redis.conf/etc/redis/6

The leaderboard feature is a very common requirement. Using the attributes of an ordered collection in Redis to achieve a leaderboard is a good and fast choice.The general leaderboard is effective, such as the "User standings". If the results are

Redis is a single-threaded, in-memory database. As follows:Http://download.redis.io/releases/redis-2.8.11.tar.gzRun the make command in the Redis src directory, and then copy the executable file to the new bin directory. The following forms of

Redis plus LockCustomerm = Basememcached.setmlock (customerId);　　/** * Personal Account table plus lock **/public static customerm Setmlock (Integer userId) {customerm customerm = (customerm) setlock (User_m_userid　　+userid,

Environment Description:Main redis:192.168.10.1 6379From redis:192.168.10.2 6380First, master-slave configuration1. Change Aemonize No in the master-slave redis configuration file redis.conf to Yes2. Modify port 6379 from Redis config file

http://ordinary.iteye.com/blog/1097457Starting with this article (called The Redis Analysis series), you will explore the internal implementation of Redis by analyzing its source code (with the Redis 2.2.0 RC1 as the standard). This article mainly

We know that Redis sets the maxmemory parameter of the configuration file to control its maximum available memory size (bytes).What if the required memory exceeds MaxMemory ?This time the maxmemory-policy in the configuration file appeared.Its

OverviewRedis-sentinel is a highly available (HA) solution that is officially recommended by Redis, and if Master is down, the Redis itself (including many of its clients) does not implement automatic primary and standby switching when using Redis

Main redis:192.168.1.155:6379From redis:192.168.1.155:6380sentinel:192168.1.155:26379Copy the/usr/local/redis directory as shown650) this.width=650; "src=" http://s2.51cto.com/wyfs02/M00/84/94/wKioL1eVl66jNtdDAAArzZwfyQU225.jpg "title=" 1.jpg " alt=

The installation of Redis is described earlier, followed by a brief description of the Redis configuration parameters.1.Redis General ConfigurationDaemonize No # By default, Redis is not run in daemon form. Daemonize Configuration Items Control the

I. Introduction to REDIS Publishing subscriptionsA publish Subscription (PUB/SUB) is a message communication pattern that is primarily designed to decouple the coupling between a message publisher and a message subscriber. Pub/sub not only solves

1. Introduction to RedisRedis is a remote in-memory database that not only has strong performance, but also has replication features and a unique data model for solving problems. Redis provides 5 different kinds of data structures.Redis is a very

in the previous 2 articles we had a quick look at the installation of memcached and the combination of PHP. Now I introduce another NoSQL key-value database, Redis, and find out that Redis uses more than memcached and has more powerful features

First, you need to set the maximum memory limitmaxmemory 100mbSelect a policymaxmemory-policy noevictionExplain:Noeviction: Default policy, do not retire, if memory is full, add data is an error.ALLKEYS-LRU: In all keys, choose the least recently

I. Overview of getting Started with Redis1, what is it? 　　　　(1) Full name:REmote DIctionary Server(Remote dictionary server). is completely open source free, in C language, adhere to the BCD protocol. is a high-performance (key/value)

A jumping table is a data structure that inserts, queries, and deletes the average time complexity of O (Nlogn), which is O (n) in the worst case, which is almost impossible to come by.compared to the red and black trees .The worst time complexity

　　the Redis list type is actually a doubly linked list in which each child element is a string type. so [Lr]push and [Lr]pop] the algorithm time complexity of the command is O (1). The list will also record the length of the linked list. Therefore