redis remove key

For an already existing key, we can set its expiration time, after that time, when you visit again, key will not existThere are two ways to set the expiration time, one is to specify how long the key will survive from the current time, the time unit has two, one is the second, the other is the millisecondThe second way is to specify the

The first step is to modify the configuration file ############################# EVENT NOTIFICATION ############################### Redis can notify Pub/sub clients about events happening in the key space.# This feature was documented at Http://redis.io/topics/notifications## for instance if Keyspace events notification is enabled, and a client# performs a DEL operation on

Redis is a high-performance Key-value database.The emergence of Redis, to a large extent, compensates for the lack of memcached such keyvalue storage, in some cases can be a good complement to the relational database.Redis is essentially a key-value database, but it also absorbs the advantages of some relational databa

hashing (hash)The Hash type in Redis can be seen as a map container with string key and string value. This type is ideal for storing object information. such as the user's username password and so on. Each Hash can store 4,294,967,295 key-value pairs Storage (Hset) Hset key field Value field does not exist and is stor

Redis.clients.jedis.exceptions.JedisDataException:WRONGTYPE Operation against a key holding the wrong kind of value Today to change the code, a run ran wrong, the wrong reason: Because the same key already exists in the Redis, and the value type of the key is not set, it is Sortset (before the change), and the error

A problem occurred when inserting data using Jedis: Redis.clients.jedis.exceptions.JedisDataException:WRONGTYPE Operation against a key holding the wrong kind of value This is probably how the code is implemented: hashmap It doesn't look like the value type is wrong. It turns out that the same key already exists in the Redis database, and that the value ty

An issue occurred when inserting data using Jedis:Redis.clients.jedis.exceptions.JedisDataException:WRONGTYPE operation against a key holding the wrong kind of value The code is probably implemented like this: hashmap There seems to be no value type that looks wrong. It turns out that the same key already exists in the Redis database, and that the value type f