redis remove key

Experience on using the keyvalue database redis and TTSERVER. Redisredis is a keyvalue storage system similar to memcached. it supports a large number of stored value types, including string, list, and set) and zset Redis firstRedis is a key/value storage system similar to memcached. it supports a large number of storage value types, including string, list, and s

The first says that Redis Redis is a memcached-like key/value storage system that supports a relatively large number of stored value types, including string (string), list (linked list), set ( Collection) and Zset (ordered set). On this basis, Redis supports a variety of different ways of ordering. As with memcache

Commands Clients Documentation Community DOWNLOAD support Licensejoin us in London October 19th for the 2nd Redis develope RS Day and October 20th for the Redis unconference London.redis keyspace NotificationsIMPORTANT Keyspace Notifications is a feature available since 2.8.0Feature OverviewKeyspace notifications allows clients to subscribe to PUB/SUB channels in order to receive events affecting the

Xinxing analyzes key-related commands in Redis, and Xinxing analyzes rediskey In Redis, we can also directly operate on keys. The following are common commands: (1) keypattern: It indicates getting all the keys matching pattern. Note that we should avoid using this command because it is very time-consuming for large databases, the performance of the

As the cache system periodically cleans up invalid data, a primary key invalidation and elimination policy is required.In Redis, a lifetime key is called volatile. When creating a cache, to set the lifetime for a given key, it may be deleted when the key expires (with a life

Open service$sudo./src/redis-server Key operation* Define and assign a variable number of apples$ redis-cli Set Dangcheng::apple::count 152Ok * Get the number of apples just now$ redis-cli Get Dangcheng::apple::count"152" * When the number of apples increases by 1 incr keyword is actually shorthand for increment$

. Otherwise, in seconds, the remaining survival time of the key is returned. Before Redis 2.8, when the key does not exist, or the key does not set the remaining survival time, the command returns-1. Move: Transfers keys in the current database to other databases In this example, I first explicitly select database

Redis Hash Key command Implementation (T_hash) 1. Hash command Introduction All Redis hash commands are shown in the following table: Redis hash command in detail Serial Number Command and Description 1 Hdel key Field2 [field2]: Delete

Original link: http://blog.csdn.net/yunhaibin/article/details/9001198 Recent research into Redis, and spring data support for Redis, has found a strange phenomenonFirst say the phenomenon, through the redistemplate under the Opsforhash method to store the value of the hash type, after the successful operation, to the Redis console to display the keys *, foun

Rename oldkey Newkey Renaming Dbsize Returns the number of keys in the database TTL key For the key that has the expiration time set, the calculation is how long it will expire, in seconds. Pttl Key This command is similar to the TTL command, but it returns the remaining lifetime of the

Reprinted: http://tech.it168.com/a2011/0815/1232/000001232720_all.shtml In previous articles, we introduced redis Quick Start: Key-value storage system introduction. Today we will further explain why we chose key-Value Store. Key-value store is a popular topic nowadays, especially when constructing large Internet app

Redis is a widely used key-value memory database. Like memecached, keys can be set to a life cycle. Setting the key expiration time in redis is very simple: SETEXmykey10Hello sets a 10-Second Life Cycle for mykey. However, when you use other redis data structures, such as LI

1. knowledge required in advance1. Every database in redis is stored in a redisDb structure. Here, redisDb. id stores the numbers represented by integers in the redis database. RedisDb. dict stores all key-value pairs of the database. RedisDb. expires stores the expiration time of each key.2. When the

For example: I now have an array of Array '10000_20000'=>'上海'， '20001_30200'=>'北京'， '30201_30300'=>'天津'， '30301_40000'=>'深圳' ）Now, I'm going to put each value in the array into the Redis cache, the cache key value can be the array key value after any processing, then I pass in a value of 38000, I want to find in the cache

After installing redis, enter the command./redis-server in the terminal to start the database. After the database is started successfully, it regularly records the connection read/write status. After starting the database, open another terminal and directly enter the command, Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> $./

ArticleDirectory User Logon System Tag System The rich data structure makes redis design very interesting. Unlike relational databases, Dev and DBA need to communicate in depth, and review does not require DBA participation for each row of SQL statements like memcached. Apsaradb for redis DBAs must be familiar with the data structure and understand the application scenarios. Below are s

The rich data structure makes the design of Redis very interesting. Unlike relational databases, Dev and DBAs require deep communication, review each line of SQL statements, and unlike memcached, do not require DBA involvement. Redis DBAs need to be familiar with data structures and understand usage scenarios. Here are some common examples of the KV database to talk about the design of

For example, I now have an array ({code ...}) now, I want to save each value in the array to the redis Cache. the cached key value can be the value of the array key after any processing. at this time, I input a value of 38000, I want to find the cache value with the key value containing 38000 in the cache. what is ther

What are the differences between memcached's primary key deletion method and redis? First, memcached also uses a negative method when deleting an invalid primary key, that is, memcached does not monitor whether the primary key is invalid, but checks whether it has expired only when it accesses the primary

SET set 1 jingya Del del 1 Dump, it's not going to restore.RESTORE key TTL serialized-value Exists exists 1 EXPIRE expire 1 10 // 10s后失效 ttl 1 //只需观察1 Expireat expireat 2 1455886380 // 使用unix时间戳设置过期时间 KEYS KEYS * 匹配数据库中所有 key 。