How can I see all Redis keys?

How can I see all Redis keys?

Try to look at KEYS command. KEYS * will list all keys stored in redis.

How do I find my Redis key-value?

Redis TYPE command is used to get the data type of the value stored in the key.

  1. Return Value. String reply, data type of the value stored in the key or none.
  2. Syntax. Following is the basic syntax of Redis TYPE command. redis> TYPE KEY_NAME.
  3. Example. First, create some keys in Redis and set some values in it.

How do I get all Redis?

There are two ways to get all keys from the all databases in Redis. The first way is to list keys using –scan option and the second one is to get all keys using the KEYS command.

Is Redis a key-value store?

Redis is not a plain key-value store, it is actually a data structures server, supporting different kinds of values.

What are Redis keys?

Redis Keys are Ideal for Keeping Track of Lots of Strings. For the (simple string) key-value data type Redis allows you to set, get, delete, and increment arbitrary string pairs. You can only have 1 value at a time for each key (i.e. set is destructive assignment). You can also delete keys.

How long can a Redis key be?

The maximum allowed size of a key is 512 MB. To reduce memory usage and facilitate key query, ensure that each key does not exceed 1 KB. The maximum allowed size of a string is 512 MB. The maximum allowed size of a Set, List, or Hash is 512 MB.

What is MSET in Redis?

Redis MSET command is used to set multiple values to multiple keys. It replaces existing values with new values. Syntax: MSET key1 value1 key2 value2 .. keyN valueN.

How is data stored in Redis?

Since Redis is an in-memory database, data is stored in memory (or RAM). This way, the data is loaded from the disk to the memory when the server reboots. Redis has two persistence options: RDB persistence (snapshotting): Snapshots of the data are stored in a disk in a dump.

Does Redis allow duplicate keys?

You can use the DUMP and RESTORE commands to duplicate the key: use the DUMP command to serialize the value of a key. use the RESTORE command to restore the serialized value to another key.

How many keys Redis can store?

232 keys
Redis can handle up to 232 keys, and was tested in practice to handle at least 250 million keys per instance. Every hash, list, set, and sorted set, can hold 232 elements. In other words your limit is likely the available memory in your system.

How many keys can Redis handle?

Redis can handle up to 232 keys, and was tested in practice to handle at least 250 million keys per instance. Every hash, list, set, and sorted set, can hold 232 elements.

What is pipeline in Redis?

Pipelines provide a way to transmit multiple commands to the Redis server. in one transmission or in one network call. This is convenient for batch processing, such as saving all the values in a list to Redis or getting multiple values one after another.

Does Redis rehash the keys?

Redis uses the CRC16 algorithm to map keys to hash slots. There are 16384 hash slots in Redis Cluster, and to compute what is the hash slot of a given key, we simply take the CRC16 of the key modulo 16384. There is no need for rehashing the key before writing to Redis, Redis does it for you.

Is it possible to set default TTL for all keys in Redis?

Redis does not provide this ability – you’ll have to explicitly set a TTL for every key. Note that updating a key resets its TTL, so you’ll have to re-set it accordingly.

How does Redis expire keys?

Redis keys are expired in two ways: a passive way, and an active way. A key is passively expired simply when some client tries to access it, and the key is found to be timed out. Of course this is not enough as there are expired keys that will never be accessed again.

How is the Redis sorted set implemented?

Sorted set in Redis is implemented by using a skip list and a hash map . The Redis CLI commands provided in this article can be executed directly from Redis CLI. The equivalent methods of redis-py are used in the Python examples to interact with the Redis server. A skip list maintains a collection of subsequences on an ordered set of items.