In a number of instances, you might need to delete all keys from your Redis database. For example, during testing, you may want to clear the database to reset the environment. Or you may wish to remove all keys as part of a caching strategy when the data becomes invalid or stale.
Consider you have a connection established with your Redis instance using the
redis gem in Ruby. To delete all keys, you can use the
flushdb method, which removes all keys from the current database:
This code will empty the current selected database. It's worth noting that
flushdb operates on the currently selected database only.
If you want to delete keys across all databases, use the
This snippet will erase all keys in every database on the Redis server.
flushall, as these operations are not reversible.
flushdbon a production database.
flushdbaffect other databases on the server? No,
flushdbonly removes keys from the currently selected database.
flushdb? No, once executed, these operations are irreversible.