Safety management method of data nodes in distributed system

The invention provides a safety management method of data nodes in a distributed system. The safety management method comprises the following steps that the physical state of each data node and a transfer path of each physical state are determined; a management system manages the physical state of each data node; data operation is managed by the data nodes in different physical states. According to the safety management method, the six physical states are defined for all the data nodes, the timeliness of monitoring of the health degree of data is guaranteed, and therefore a user can know the health condition of the data on all the nodes of the whole distributed system. Besides, as for deletion of the data nodes, only the data nodes in the zombie state can be deleted; if the user wants to delete the data nodes in the health state, the user must conduct manual rebuilding on the data nodes in the health state, the data nodes in the health state can be deleted only after being rebuilt, and therefore the safety of the data of the distributed system is guaranteed fundamentally.