International Business Machines Corporation

Herbert M Lee

Peter Kenneth Malkin

Wim De Pauw

Shang Qing Guo

Irina Rish

Nianjun Zhou

Emmanuel Yashchin

Irwin Boutboul

Ilya Gluhovsky

Alina Beygelzimer

Alan Jerome Hoffman

A method, system, and computer program product graphically display attributes associated with virtual images. A set of attributes associated with each virtual image in a plurality of virtual images is analyzed. At least one graph including a plurality of nodes is generated. Each node in the plurality of nodes represents one virtual image in the plurality of virtual images. Each node is graphically displayed with at least one visual indicator. The at least one visual indicator represents at least one attribute in the set of attributes associated with the virtual image represented by the node.

Visualization of virtual image relationships and attributes

A method graphically displays attributes associated with virtual images. A set of attributes associated with each virtual image in a plurality of virtual images is analyzed. At least one graph including a plurality of nodes is generated. Each node in the plurality of nodes represents one virtual image in the plurality of virtual images. Each node is graphically displayed with at least one visual indicator. The at least one visual indicator represents at least one attribute in the set of attributes associated with the virtual image represented by the node.

The invention concerns apparatus and methods that determine availability and performance of entities providing services in a distributed system using filtered service-consumer feedback. In particular, apparatus and methods of the invention filter service-consumer feedback in order to reduce the effect of circumstances unique to individual service consumers or to groups of service consumers that do not accurately reflect the actual availability or performance of service-providing entities. In this way an accurate appraisal is gained regarding the performance and availability of a service-providing entity. Reactive methods of the invention can be combined with proactive methods such as, for example, active status probing, to further improve the accuracy of data concerning the status and availability of service-providing entities.

Apparatus and methods for determining availability and performance of entities providing services in a distributed system using filtered service consumer feedback

A diagnostic system in which, at every point in time, a forecast is made of the future response times of each EPP (nd-to-endrobelatform) probe in a battery of probes. Thresholds are established in terms of the distribution of future EPP values. The theory of Generalized Additive Models is used to build a predictive model based on a combination of a) data normally generated by network nodes, b) results of a battery of probes and c) profile curves reflecting expected response times (i.e. based on recent history) corresponding to this battery for various times of day, days of week, month of year, etc. The model is pre-computed, and does not have to be dynamically adjusted. The model produces, at regular intervals, forecasts for outcomes of various EPP probes for various horizons of interest; also, it produces thresholds for the respective forecasts based on a number of factors, including acceptable rate of false alarms, forecast variance and EPP values that are expected based on the recorded history. The system is capable of maintaining a pre-specified low rate of false alarms that could otherwise cause a substantial disturbance in network operation.

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New Fairfield, CT, United States of America

Herbert M Lee