Abstract: A method and system are provided for use in a computer collaboration environment. In one example, the method includes identifying that a resource should be failed over from one computer to another computer within the environment. A history of the resource's execution within the cluster is examined, and the resource is failed over only if a risk assessment based on the history indicates that a risk level of loading the resource does not exceed an acceptable risk threshold.

Abstract: A queue includes a plurality of containers. Each container includes a lock. Clients, possibly in a multiprocessor system, can simultaneously access the queue, each client locking only a single container as needed. The clients can access the queue without using a lock manager, directly accessing the container locks to determine whether the containers are in use.

Abstract: A replication method supports file replication across a plurality of file servers by tracking the changes to the local volume on the storage system. Each change is then ranked according to a number of criteria. Each criterion is weighted, and an overall ranking is determined for each change. The changes are then ordered according to their ranks, and each change is transmitted to remote storage systems for remote duplication of the change.

Abstract: A queue includes a plurality of containers. Each container includes a lock. Clients, possibly in a multiprocessor system, can simultaneously access the queue, each client locking only a single container a needed. A manager can lock the entire queue to perform maintenance.

Abstract: An infrastructure on a file server registers one or more replication modules to support file replication across a plurality of file servers. Each replication module can support file replication for any number of volumes on the file server, but each volume can be replicated by at most one replication module. The replication modules register with the replication module by identifying themselves to the replication infrastructure, identifying those activities the replication modules wish to be notified about, and identifying those volumes each replication module will support. The replication infrastructure tracks each volume. When a watched activity occurs, the replication infrastructure notifies the supporting replication module. Finally, when the replication infrastructure receives an update from the replication module, the replication infrastructure performs the update to the supported volume.