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In addition, Lockval Engine includes db and several supporting APIs.

Lockval Engine is developed around the concept of data-oriented programming. Therefore, it is generally not recommended to use an external database.

The db in Lockval Engine is a bit like redis, which provides hot data in memory and saves changing cold data in real time

Regarding the location of db in Lockval Engine, you can view the architecture diagram on this page: https://lockval.com/docs/