Abstract: Method and system for implementing a cluster token registry (“CTR”) process in a cluster comprising a plurality of interconnected nodes each having a CTR associated therewith are described. In one embodiment, the method comprises, responsive to a client signing in at one of the nodes, the client registering a cluster-wide token with the CTR of the node, thereby casting a vote in connection with the token; determining whether prerequisites for granting the token have been met; and, responsive to a determination that the prerequisites have been met, granting the token. The method further comprises periodically determining whether the vote in connection with the token vote has been refreshed by the client and, responsive to a determination that the vote in connection with the token has not been refreshed by the client, de-registering the client.

Abstract: Method and system for implementing a backup in a cluster comprising a plurality of interconnected nodes, at least one of the nodes comprising a cluster resource manager (CRM), and at least one of the nodes comprising a policy engine (PE), the PE maintaining at least one dependency associated with at least a first resource executing on at least one of the nodes. For example, the method comprises, receiving by the CRM a backup request for the first resource from an administrator; responsive to the request, updating by the CRM the cluster configuration; communicating by the CRM to the PE a cluster status and the updated configuration; providing by the PE to the CRM an instruction sequence for carrying out the backup, the instruction sequence based on the dependency associated with the first resource; and responsive to the instruction sequence, carrying out by the CRM the backup of the first resource.

Abstract: Method and system for implementing a dead man dependency technique in a cluster comprising a plurality of interconnected nodes, one of the nodes comprising a cluster resource manager (CRM), and one of the nodes comprising a policy engine (PE), the PE maintaining at least one dependency associated with a first resource executing on one of the nodes. In an embodiment, the method comprises, responsive to a status change of an attribute associated with the first resource, the PE receiving from the CRM an indication of the status change and information regarding a configuration of the cluster; responsive to receipt of the status change indication and the configuration information, identifying by the PE a manner of terminating and migrating the first resource to another one of the nodes; and providing by the PE to the CRM an instruction sequence for causing the identified manner of terminating and migrating the first resource.

Abstract: Method and system for implementing a backup in a cluster comprising a plurality of interconnected nodes, at least one of the nodes comprising a cluster resource manager (CRM), and at least one of the nodes comprising a policy engine (PE), the PE maintaining at least one dependency associated with at least a first resource executing on at least one of the nodes. For example, the method comprises, receiving by the CRM a backup request for the first resource from an administrator; responsive to the request, updating by the CRM the cluster configuration; communicating by the CRM to the PE a cluster status and the updated configuration; providing by the PE to the CRM an instruction sequence for carrying out the backup, the instruction sequence based on the dependency associated with the first resource; and responsive to the instruction sequence, carrying out by the CRM the backup of the first resource.

Abstract: Method and system for implementing a dead man dependency technique in a cluster comprising a plurality of interconnected nodes, one of the nodes comprising a cluster resource manager (CRM), and one of the nodes comprising a policy engine (PE), the PE maintaining at least one dependency associated with a first resource executing on one of the nodes. In an embodiment, the method comprises, responsive to a status change of an attribute associated with the first resource, the PE receiving from the CRM an indication of the status change and information regarding a configuration of the cluster; responsive to receipt of the status change indication and the configuration information, identifying by the PE a manner of terminating and migrating the first resource to another one of the nodes; and providing by the PE to the CRM an instruction sequence for causing the identified manner of terminating and migrating the first resource.

Abstract: Method and system for implementing a cluster token registry (“CTR”) process in a cluster comprising a plurality of interconnected nodes each having a CTR associated therewith are described. In one embodiment, the method comprises, responsive to a client signing in at one of the nodes, the client registering a cluster-wide token with the CTR of the node, thereby casting a vote in connection with the token; determining whether prerequisites for granting the token have been met; and, responsive to a determination that the prerequisites have been met, granting the token. The method further comprises periodically determining whether the vote in connection with the token vote has been refreshed by the client and, responsive to a determination that the vote in connection with the token has not been refreshed by the client, de-registering the client.