The route-based hash policy of the persistence layer is different from that of the service layer. The route-based hash policy of the persistence layer is implemented based on weights, while that of the service layer is implemented based on STORE DHT.

Unstructured and structured services at the service layer have different route-based hash policies. However, both unstructured and structured services are mapped based on the same basic routing model.

In load balancing at the semantic layer, a directory is divided into 256 partitions by default and can be adjusted to a maximum of 512 partitions.

Routes at the service layer balance storage space and accelerate fault reconstruction.