Storage system with highly consistent business model, software model and storage model

The invention belongs to the field of computers, and particularly discloses a storage system with highly consistent business model, software model and storage model, which comprises the following steps: S1, combining a B + tree disk data structure of a relational database management system with a graph storage structure of a graph database; s2, standard SQL statement support is provided for complex query and relation modes, and brand-new SQL dialects and database concepts are not created at will; s3, providing relevant operation support of proximity query, depth-first traversal and breadth-first traversal based on the original graph database for graph data query; s4, providing protocol supports such as MYSQL, POSTGRESQL, ORACLE NET and TDS for complex query and relation modes so as to adapt to database protocols commonly used in the market, and not creating brand-new protocols at will; and S5, providing a built-in RESTful protocol or HTTP protocol support for all queries, and describing the formats of the que