optuna.storages
The ~optuna.storages module defines a ~optuna.storages.BaseStorage class which abstracts a backend database and provides library-internal interfaces to the read/write histories of the studies and trials. Library users who wish to use storage solutions other than the default in-memory storage should use one of the child classes of ~optuna.storages.BaseStorage documented below.
optuna.storages.RDBStorage optuna.storages.RedisStorage