International Business Machines Corporation

Brian Phillip Ernest Fisk

Barry Keith Aldred

Paul A Beaven

Davin Morris Coleman

In an asynchronous message queuing network, a data processing method of finding a lost message includes the steps of: sending a first message from an originating data processing unit to an intermediate data processing unit, the message including an indication that the message is traceable; sending a tracer message from an originating data processing unit to an intermediate data processing unit, the tracer message identifying the first message as a lost message which the originating data processing unit would like to find; at the intermediate data processing unit, upon receiving the tracer message, checking to determine whether the first message exists within the intermediate data processing unit, and sending a reply message back to the originating unit if the first message is found within the intermediate data processing unit; and at the intermediate data processing unit, if the first message is not found within the intermediate data processing unit, determining whether the first message has passed through the intermediate data processing unit, and if the first message has passed through the intermediate data processing unit, determining a neighboring data processing unit which received the first message from the intermediate data processing unit and forwarding the tracer message to the neighboring data processing unit.

Data processing technique for message tracing in an asynchronous messaging network

A data communications apparatus connected to a network through which datagrams flow from the data communications apparatus to at least one other data communications apparatus also connected to the network, the apparatus having: a means for receiving data which is to be transmitted over the network, such data being broken up into data records; and a means for packing the data records into datagrams for transmission over the network, including a means for assigning data records to datagrams; wherein the means for packing takes the data records out of sequential order when assigning data records to datagrams.

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Winchester, United Kingdom

Brian Phillip Ernest Fisk