Automated failover in a cluster of geographically dispersed server nodes using data replication over a long distance communication link

摘要

An embodiment of the invention is a method for performing an automated failover from a remote server node to a local server node, the remote server node and the local server node being in a cluster of geographically dispersed server nodes. The local server node is selected to be recipient of a failover from a remote server node by a cluster service software. The local server node is coupled to a local storage system and a local replication module external to the local storage system. The remote server node is coupled to a remote storage system and a remote replication module external to the remote storage system. The local and remote replication modules are in long distance communication with each other to perform data replication between the local and remote storage systems. A controlling cluster resource is brought online at the local server node, the controlling cluster resource being a base dependency of dependent cluster resources in a cluster group. The state of the controlling cluster resource is set to online pending to delay the dependent cluster resources in the cluster group from going online at the local server node. Configuration information of the controlling cluster resource is then verified.