Abstract:
A guaranteed distributed failure notification method is described, wherein a failure notification (FN) facility allows applications using the facility to create FN groups to which the application associates an application state. The application registers failure handlers with the FN facility on nodes in the FN group; each failure handler is associated with a specific FN group. When, on a given node, the FN facility learns of a failure in the FN group, the facility executes the associated failure handler on that node. System failures detected by the application are signaled to other FN group members using the facility. The facility detects system failures that occur in an overlay network on which the facility is implemented, and signals a failure notification to the other FN group members.
Abstract:
A method and system for managing data records on a computer network is described, in which copies of data records are distributed among various servers in a hierarchical tree structure, and in which servers that experience an excessive number of requests for a particular data record transmit replicas of that data record to other servers to distribute the load.
Abstract:
Described herein is an implementation of a technology for the construction, identification, and/or optimization of operating-system processes. At least one implementation, described herein, constructs an operating-system process having the contents as defined by a process manifest. Once constructed, the operating-system process is unalterable.
Abstract:
A scalable method and system for easily scheduling data transfer or a a video-on-demand server system is provided. A strategy for locating available bandwidth and allocating available bandwidth to subscribers as needed is provided. The input/output bandwidth of storage devices that store data for video image sequences is modelled as a series of bandwidth units. Each bandwidth unit has sufficient capacity to service an individual subscriber during a scheduling cycle. Video image sequences or other data sequences are striped across storage devices such that data for a data sequence is forwarded to the subscriber by reading from a sequence of storage devices in consecutive time frames.
Abstract:
Described herein is an implementation of a technology for the construction, identification, and/or optimization of operating-system processes. At least one implementation, described herein, constructs an operating-system process having the contents as defined by a process manifest. Once constructed, the operating-system process is unalterable.
Abstract:
A method and system for managing data records on a computer network is described, in which copies of data records are distributed among various servers in a hierarchical tree structure, and in which servers that experience an excessive number of requests for a particular data record transmit replicas of that data record to other servers to distribute the load.
Abstract:
A guaranteed distributed failure notification method is described, wherein a failure notification (FN) facility allows applications using the facility to create FN groups to which the application associates an application state. The application registers failure handlers with the FN facility on nodes in the FN group; each failure handler is associated with a specific FN group. When, on a given node, the FN facility learns of a failure in the FN group, the facility executes the associated failure handler on that node. System failures detected by the application are signaled to other FN group members using the facility. The facility detects system failures that occur in an overlay network on which the facility is implemented, and signals a failure notification to the other FN group members.