Control method and system access in cluster system

The invention provides a method and system for controlling access in a cluster system, wherein the system comprises the cluster system and a control system, wherein the cluster system comprises at least two nodes mutually used as master nodes and slave nodes, application layers of the at least two nodes share resources of a disk, the control system comprises cluster control devices positioned on the application layers of the cluster system, each cluster control device comprises a detection module and a first processing module, the detection module is used for detecting whether same applications on N nodes exist in the at least two nodes and access is initiated to the disk, wherein N is an integer of more than or equal to 2; and the first processing module is used for initiating a process of shielding the access of the applications of N-1 nodes in the N nodes to the disk when the detection module detects that the same applications on the N nodes exist in the at least two nodes.