Database system updating method and related device

The invention discloses a database system updating method which is applied to a database comprising a first node, a second node and a shared storage device. The method comprises the steps that a first node sends a first instruction to a second node, the first instruction is used for requesting storage position information of first data in a shared storage device, and the first data is data transferred to the first node by the second node to be processed; the first node obtains the first information sent by the second node and obtains mapping information from the shared storage device according to the first information, and the mapping information is used for indicating the storage position of the first data in the shared storage device. Based on the method, when the computing resources of the database system are updated, a large amount of data does not need to be migrated among the nodes, but only the mapping information used for recording the data storage position is migrated, the updating efficiency of the