Modeling and Forecasting Reserve Capacity for Overbooked Clusters

In a computing environment, a method of managing cluster resources for a cluster, the method comprising:

• identifying a plurality of quiescence policies, wherein each of the quiescence policies define one or more conditions for cluster entities which when met, identify that cluster resources should be reclaimed from cluster entities by quiescing cluster entities;
• for each quiescence policy in the plurality of quiescence policies, identifying an amount of reclaimed capacity defining the amount of cluster resources that will be reclaimed by implementing the quiescence policy;
• for each quiescence policy in the plurality of quiescence policies, identifying an amount of reserve capacity defining the amount of cluster resources that should be reserved for resuming quiesced cluster entities;
• selecting a quiescence policy from among the plurality of quiescence policies based on comparing the reclaimed capacities and reserve capacities for the quiescence policies in the plurality of quiescence policies;
• and
• booking cluster resources for cluster entities on the cluster according to the selected quiescence policy.

A cluster system comprising:

• a plurality of cluster resources;
• a plurality of cluster entities deployed on the cluster resources;
• and
• wherein the cluster system is configured to manage cluster resources for the cluster system by:
• identifying a plurality of quiescence policies, wherein each of the quiescence policies define one or more conditions for cluster entities which when met, identify that cluster resources should be reclaimed from cluster entities by quiescing cluster entities;
• for each quiescence policy in the plurality of quiescence policies, identifying an amount of reclaimed capacity defining the amount of cluster resources that will be reclaimed by implementing the quiescence policy;
• for each quiescence policy in the plurality of quiescence policies, identifying an amount of reserve capacity defining the amount of cluster resources that should be reserved for resuming quiesced cluster entities;
• selecting a quiescence policy from among the plurality of quiescence policies based on comparing the reclaimed capacities and reserve capacities for the quiescence policies in the plurality of quiescence policies;
• and
• booking cluster resources for cluster entities on the cluster according to the selected quiescence policy.