Deleting keys with a certain prefix is common when you want to clear a subset of data within your Redis database. This is usually done in scenarios where related keys have a common prefix, such as session ids for particular users or cached values from a specific operation.
In Java, we use the Jedis library to interact with Redis. Below are the code examples.
Deleting all keys with a given prefix:
Here, we first connect to the Redis server running on localhost. Then we get all the keys that start with 'prefix' using the
keys method. Finally, we delete each key using the
keyscommand in a production environment as it can potentially block the Redis server while it is executing, especially when the key space is large. Instead, consider using
SCANin combination with
MATCHfor safer deletion.