Cache that uses Upstash Redis as a backend.
An instance of Upstash Redis client class (e.g., Redis) used for caching. This allows the object to communicate with Redis server for caching operations on.
Time-to-live (TTL) for cached items in seconds. If provided, it sets the time duration for how long cached items will remain valid. If not provided, cached items will not have an automatic expiration.
Look up based on prompt and llm_string.
Update cache based on prompt and llm_string.
Clear cache. If asynchronous is True, flush asynchronously.
This flushes the whole db.
