How do I delete everything in Redis?

Question

I want to delete all keys. I want everything wiped out and give me a blank database.

Is there a way to do this in Redis client?

Answer 1

FLUSHALL Remove all keys from all databases

FLUSHDB Remove all keys from the current database

SCRIPT FLUSH Remove all the scripts from the script cache.

Answer 2

Use FLUSHALL ASYNC if using (Redis 4.0.0 or greater) else FLUSHALL.

https://redis.io/commands/flushall

Note: Everything before executing FLUSHALL ASYNC will be evicted. The changes made during executing FLUSHALL ASYNC will remain unaffected.

Answer 3

you can use following approach in python

def redis_clear_cache(self):

    try:
        redis_keys = self.redis_client.keys('*')
    except Exception as e:
        # print('redis_client.keys() raised exception => ' + str(e))
        return 1

    try:
        if len(redis_keys) != 0:
            self.redis_client.delete(*redis_keys)
    except Exception as e:
        # print('redis_client.delete() raised exception => ' + str(e))
        return 1

    # print("cleared cache")
    return 0

Answer 4

If you are using Java then from the documentation, you can use any one of them based on your use case.

/**
 * Remove all keys from all databases.
 *
 * @return String simple-string-reply
 */
String flushall();

/**
 * Remove all keys asynchronously from all databases.
 *
 * @return String simple-string-reply
 */
String flushallAsync();

/**
 * Remove all keys from the current database.
 *
 * @return String simple-string-reply
 */
String flushdb();

/**
 * Remove all keys asynchronously from the current database.
 *
 * @return String simple-string-reply
 */
String flushdbAsync();

Code:

RedisAdvancedClusterCommands syncCommands = // get sync() or async() commands 
syncCommands.flushdb();

Read more: https://github.com/lettuce-io/lettuce-core/wiki/Redis-Cluster

Answer 5

redis-cli -h <host> -p <port> flushall

It will remove all data from client connected(with host and port)

Answer 6

Heads up that FLUSHALL may be overkill. FLUSHDB is the one to flush a database only. FLUSHALL will wipe out the entire server. As in every database on the server. Since the question was about flushing a database I think this is an important enough distinction to merit a separate answer.