International Business Machines Corporation

Mike Joseph Spreitzer

Asser Nasreldin Tantawi

Malgorzata Steinder

Ian N Whalley

Vita Bortnikov

Alexey Roytman

Gregory Chockler

Claris Castillo

A method of updating statuses of processes in a network is provided. The method may include the following steps: connecting N processes on a K-connected overlay network of nodes which is in operative association with a computer network; determining an update of subscription and un-subscription statuses of at least some of the processes; generating update messages reflecting the subscriptions and the un-subscriptions, the update messages being differences between previous update and current update; and propagating the update messages through the K-connected graph, such that at least some of the processes transfer the update to its respective K neighboring nodes, wherein at least one of the connecting, the subscribing, the unsubscribing, the generating, and the propagating is executed by at least one processor.

Propagating changes in topic subscription status of processes in an overlay network

A method, system and computer program product for distributing intermediate data of a multistage computer application to a plurality of computers. In one embodiment, a data manager calculates data usage demand of generated intermediate data. A computer manager calculates a computer usage, which is the sum of all data usage demand of each stored intermediate data at the computer. A scheduler selects a target computer from the plurality of computers for storage of the generated intermediate data at such that a variance of the computer usage demand across the plurality of computers is minimized.

Distribution of intermediate data in a multistage computer application

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Mike Joseph Spreitzer