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What to do if the redis set operation fails

What to do if the redis set operation fails

How to resolve Redis SET operation failures: Upgrade memory or optimize the phasing strategy to resolve insufficient key space. Reset the key's survival time or use the SETEX command to create a key with survival time to resolve the issue where the key exists and the EXAT command is set. Split large values ​​or use data structures such as list/hash to solve the problem of value size exceeding the limit. Use transaction or SETNX commands to avoid setting conflicts. Check logs, restart the server, or optimize the configuration to resolve input/output errors.

Apr 10, 2025 pm 07:39 PM
redis 网络问题 键值对
How to set the redis queue

How to set the redis queue

The steps to set up a queue in Redis include: 1. Create a list; 2. Push items into the queue; 3. Eject items from the queue; 4. Get the queue length; 5. Block pop-up; 6. Block enqueue; 7. Delete the queue.

Apr 10, 2025 pm 07:36 PM
redis
How to turn off redis sentinel mode

How to turn off redis sentinel mode

To turn off Redis Sentinel mode, perform the following steps: Set down-after-milliseconds to 0 in the Sentinel configuration file. Delete the Sentinel configuration file. Delete the Sentinel data directory. Restart Redis service.

Apr 10, 2025 pm 07:33 PM
redis
How to read data from redis

How to read data from redis

To read data from Redis, you can follow these steps: 1. Connect to the Redis server; 2. Use get(key) to get the value of the key; 3. If you need string values, decode the binary value; 4. Use exists(key) to check whether the key exists; 5. Use mget(keys) to get multiple values; 6. Use type(key) to get the data type; 7. Redis has other read commands, such as: getting all keys in a matching pattern, using cursors to iterate the keys, and sorting the key values.

Apr 10, 2025 pm 07:30 PM
python redis 键值对
How to use redis zset

How to use redis zset

Redis Ordered Sets (ZSets) are used to store ordered elements and sort by associated scores. The steps to use ZSet include: 1. Create a ZSet; 2. Add a member; 3. Get a member score; 4. Get a ranking; 5. Get a member in the ranking range; 6. Delete a member; 7. Get the number of elements; 8. Get the number of members in the score range.

Apr 10, 2025 pm 07:27 PM
redis
How to start redis locally

How to start redis locally

To start Redis locally, perform the following steps: 1. Download Redis; 2. Install Redis according to the file type; 3. Go to the installation directory on the command line and start Redis; 4. Use redis-cli ping to verify that Redis is starting; 5. Use redis-cli to connect to Redis with redis-cli.

Apr 10, 2025 pm 07:24 PM
linux redis
How to implement the underlying redis

How to implement the underlying redis

Redis uses hash tables to store data and supports data structures such as strings, lists, hash tables, collections and ordered collections. Redis persists data through snapshots (RDB) and append write-only (AOF) mechanisms. Redis uses master-slave replication to improve data availability. Redis uses a single-threaded event loop to handle connections and commands to ensure data atomicity and consistency. Redis sets the expiration time for the key and uses the lazy delete mechanism to delete the expiration key.

Apr 10, 2025 pm 07:21 PM
redis 并发访问 键值对
How to obtain redis login permission

How to obtain redis login permission

To obtain Redis login permission, you need to perform the following steps: 1. Create a username and password; 2. Allow remote connections; 3. Restart the Redis server; 4. Connect using the Redis CLI or programming language.

Apr 10, 2025 pm 07:18 PM
python redis
How to view all keys in redis

How to view all keys in redis

To view all keys in Redis, there are three ways: use the KEYS command to return all keys that match the specified pattern; use the SCAN command to iterate over the keys and return a set of keys; use the INFO command to get the total number of keys.

Apr 10, 2025 pm 07:15 PM
redis 键值对
How to use single threaded redis

How to use single threaded redis

Redis uses a single threaded architecture to provide high performance, simplicity, and consistency. It utilizes I/O multiplexing, event loops, non-blocking I/O, and shared memory to improve concurrency, but with limitations of concurrency limitations, single point of failure, and unsuitable for write-intensive workloads.

Apr 10, 2025 pm 07:12 PM
mysql linux redis macos 并发请求
How to use php for redis

How to use php for redis

Question: How to use Redis in PHP? Install the Redis PHP extension. Connect to the Redis server, use the Redis class. Store and retrieve data, and support strings, hashs, lists, and collections. Use other commands such as checking for the existence of a key, deleting a key, and setting the expiration time of the key. Close the connection after using Redis.

Apr 10, 2025 pm 07:09 PM
redis centos
How to write a redis password

How to write a redis password

To set a Redis password, modify requirepass in the configuration file to the required password and restart the service. When connecting to a password-protected instance, use the redis-cli command and provide the hostname/IP, port, and password. Pay attention to the security of your password and change it regularly to improve security.

Apr 10, 2025 pm 07:06 PM
redis
How is the key unique for redis query

How is the key unique for redis query

Redis uses five strategies to ensure the uniqueness of keys: 1. Namespace separation; 2. HASH data structure; 3. SET data structure; 4. Special characters of string keys; 5. Lua script verification. The choice of specific strategies depends on data organization, performance, and scalability requirements.

Apr 10, 2025 pm 07:03 PM
redis 键值对
How to use the redis counter

How to use the redis counter

Redis counters provide data structures for storing and operating counters. The specific steps include: Create a counter: Use the INCR command to add 1 to the existing key. Get the counter value: Use the GET command to get the current value. Increment counter: Use the INCRBY command, followed by the amount to be incremented. Decrement counter: Use the DECR or DECRBY command to decrement by 1 or specify the amount. Reset the counter: Use the SET command to set its value to 0. In addition, counters can be used to limit rates, session tracking, and create voting systems.

Apr 10, 2025 pm 07:00 PM
redis

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