redis ttl

200 Redis instances on a server, and it crashes. The only way to do this is to make different types of data belong to different applications and separate from each other.So, is there a way for Redis to keep different application data separate from each other and stored on the same instance? is equivalent to the MySQL database, different application data is stored under different databases.Under

remaining life time; If you use a value that does not exist or that has exceeded the survival time (will be deleted ),TTL, Will return-2. Note thatSETWhen setting a valueTTLWill be reset to the default value. Example: SET resource:lock 'Redis Demo 1' TTL resource: lock // return-1 EXPIRE resource: lock 120 // set the survival time to 120 seconds // 7 seco

" string SortHash (SQL: Connection * mysql_connection, redisContext * redis_connection, const string resultset_id, const string sort_field, int offset, int count, int order, int ttl) {// only SET string redis_row_set_key = "resultset that stores the HASH key. hash: "+ resultset_id; redisReply * reply; // check SET whether reply = static_cast Obviously, sorting hash keys in the result set is more intuitive and convenient than sorting string keys. Th

MyKey mykey1 Ok #由于mykey已经被重新命名, fetch again will return nil. Redis 127.0.0.1:6379> Get MyKey (nil) #通过新的键名获取. Redis 127.0.0.1:6379> Get Mykey1 "Hello" #由于mykey已经不存在了, the error message is returned. Redis 127.0.0.1:6379> Rename MyKey mykey1 (Error) ERR no such key #为renamenx准备测试key Redis 127.0.0.1:6379> set Oldkey "He

In-depth introduction to the Redis-redis underlying data structure (below), simple introduction to redis-redisOverview: 　　　　Learning to use Redis doesn't actually need to study the implementation of its underlying data. We only need to know which common data types he has, and then use them skillfully, so that we can ha

In-depth introduction to Redis-redis sentinel cluster, simple introduction to redis-redis1. Sentinel Sentinel is a Redis high availability solution: a Sentinel system consisting of one or more Sentinel instances can monitor any number of Master servers, and all slave servers under the master server. When the monitored

In-depth introduction to the Redis-redis underlying data structure (I), in-depth introduction to redis-redis1. Overview I believe everyone who has used Redis knows that Redis is a key-value-based distributed storage system, similar to Memcached, but it is better than Memcach

I believe that we have a little knowledge of data expiration in Redis, this article mainly introduces the data expiration policy in Redis, the article introduces in detail through the example code, I believe that everyone's understanding and learning has a certain reference value, the need for friends can reference, hope to help everyone. 1, the Expiration time of key in

) "channel*"3) "channeltwo"4) "world"4. Data expiration settings Redis supports setting the expiration time by key. After expiration, the value will be deleted (in the client's view, it is supplemented) Use the TTL command to obtain the expiration time of a key value (-1 indicates that the key never expires) redis 127.0.0.1:6379> SET name "John Doe"OKredis 127.0.

specified member $redis->zremrangebyscore (' Set ', 2, 3); Removes an element that has a score of between or below and returns the number of deletions 3. Other common methods 3-1 finding the relevant key According to the conditions of the corresponding key (key), support string concatenation (The return value is an array, even if the data is not found to return an empty array) //* for any character arbitrary length,? Any character one lengt

parts.)In this way, each data fragment will have an ID as its key, based on the hash code, so that you can store your data on different machines and then scale the performance linearly. )2. Data types supported by RedisStrings (String)Listing (list)Collection (SET)Hash (hash)Ordered set (Zset)3. Storage formatAll data in the Redis database is stored in memory.Advantage: Because memory reads and writes much faster than the hard disk,

the key of the current database into the given DB. Redis PERSIST Command When the key expires, key will persist. Redis pttl Command Returns the remaining expiration time of key in milliseconds. Redis TTL Command Returns the remaining lifetime (

指定Key的过期时间为10秒. Ok #通过ttl命令查看一下指定Key的剩余存活时间 (seconds), 0 indicates that it has expired,-1 means never expires. Redis 127.0.0.1:6379> TTL MyKey (integer) 4 Redis 127.0.0.1:6379> get MyKey #在该键的存活期内我们仍然可以获取到它的Value. "Hello" Redis 127.0.0.1:6379>

Redis beginners (1) -- Understanding Redis and redis beginners The official Redis website defines Redis as "Redis is an open source, BSD licensed, advanced key-value cache and store". We can see that

immediately following the watch was not executed.(nil)Redis>get Key"2"C. un-monitor-unwatch-can be considered as canceling monitoring before exec10. Key time to live-expire key seconds set the lifetime of a key, when the time arrives, the key is deleted; TTL key to see the remaining time; PERSIST key to cancel the time to liveExample:Redis>set Foo BarOkRedis>expire Foo 20(integer) 1Redis>

A: This tutorial uses the environment: ubuntu12.x, jdk1.7, Intellij idea, spring3.2.8, Redis server 3.0,jedis client 2.7.3 Spring-data-redis 1.6.0 II: Redis Server Installation Tutorial Here is an unknown solution Three: Examples of Redis cache features are: Spring Configuration: The cache uses the test class: pub

: After the string reset value, expire is not valid,Set name JamesExpire name 50TTL nameSet name James1//expire cancel at this timeTTL name//return-1, long-term valid4. Migration of keysMigrating part of the data to another Redis server1, move key DB//reids has 16 libraries with a number of 0-15Set name james1; Move name 5//migrate to 6th LibrarySelect 5;//Database switches to 6th library, get name can be taken to james1This mode is not recommended fo