Log a message to the Redis log with the given log level, without
requiring a context. This prevents Redis from including the module
name in the logged message.
Log a message to the Redis log with DEBUG log level.
This function should be used when a callback is returning a critical error
to the caller since cannot load or save the data for some critical reason.
Log a message to the Redis log with NOTICE log level.
Log a message to the Redis log with VERBOSE log level.
Log a message to the Redis log with WARNING log level.