Hitachi, Ltd.

Junichi Imanishi

Nobuo Beniyama

Hiroshi Koike

Takeshi Arisaka

Mitsuteru Omata

The present invention is for shortening the time required to discover a phenomenon related to a detected event. Reverse reproduction is performed in data stream processing. Specifically, a computer systemprocesses multiple pieces of input datain accordance with times in chronological order denoted by the timestampswithin the input data, beginning from input dataincluding a timestamp (hereinafter, latest reference stamp) that denotes the newest time from among the timestamps denoting times prior to a reference time (for example, an event detection time). A method for creating output dataincluding the result of this processing and output timing are controlled on the basis of the lifetime of the input data, which is specified by a query. In accordance with this, the output data is properly outputted using reverse reproduction.

Data processing system for reverse reproduction in data stream processing

A Business to Business electronic commerce (BtoB) system includes a message exchanging section, a task processing section and that conforms to BtoB standard specifications, and a difference processing section is added. For an outgoing business document, the difference processing section creates difference information between a past transaction and a new transaction within the range of the BtoB standard message format and sends the message to a business counterpart. For an incoming business document, the difference processing section restores a new transaction based on a past transaction and difference information.

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Tokyo, Japan

Junichi Imanishi