Netiq Corporation

Vikas Chandra

Peter James Schwaller

John Lee Wood

William Tsun

Christopher David Selvaggi

Mark Eric McCorry

David Vi Hien Quan

Methods, systems and computer program products are provided for monitoring a task executing on a data processing system, the task having an associated work in process queue and an associated work pending queue. The task is configured to properly execute requests that are terminated in progress and restarted from an initial start point. A watchdog task determines if the task is executing properly and restarts the task if it is not executing properly. Restarting is provided by placing requests in the work in process queue of the terminated task in the work pending queue and clearing the work in process queue. Execution by the task of requests from the work pending queue is then reinitiated.

Methods, systems and computer program products for monitoring interrelated tasks executing on a computer using queues

Methods, systems and computer program products are provided which coordinate operations for a plurality of interrelated tasks executing on a computer using actual state objects and desired state objects. For each event including coordination between two of the plurality of interrelated tasks, a first (or initiator) task initiates operations by a second (or executor) task to carry out a desired sequence of operations. The initiator task sets a desired state object to the desired state and submits a request to the executor task. The executor task, in turn, operates on the request in order to update an actual state object to the desired state stored in the desired state object by the initiator task. Write control over the desired state object is therefore granted to the initiator task while write control over the actual state object is granted to the executor task. A transitional state may be provided for the actual state object during the time period while the executor task is carrying out the operations necessary to change from the actual state to the desired state. Different restrictions on operations related to the associated object may be provided while the actual state object is in the transitional state. Also provided are systems, methods and computer program products for monitoring a task executing on a computer which utilizes a work in process queue and a work pending queue and restarting the task if it is not executing properly.

Methods, systems and computer program products for coordination of operations for interrelated tasks

Methods, systems and computer program products are provided which test network performance by defining test schedules including test protocols to be implemented and when the protocols should be executed for a plurality of defined connections on a network. A connection may be defined between two endpoint nodes on the network. At times specified in the test schedule, the endpoint node pair executes the test protocol and measures the performance of the network connection between the two nodes without requiring any involvement of application software which may or may not be installed on the computer hardware supporting the endpoint node. The test protocol may define the type of network layer protocol to utilize (for example, TCP), and the test script or scripts to be communicated using the appropriate stack on the computer hardware supporting the endpoint node. The schedule may be provided with an expiration date and a console node is provided for distribution of test schedules, monitoring of availability of endpoint nodes and receipt of measured performance measurements for reporting to a network manager. In further aspects of the present invention, auto-thresholding and coordination of interrelated but asynchronous tasks executing at the console node are provided.

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Cary, NC, United States of America

Vikas Chandra