Device/system for processing shared data accessed by a plurality of data processing devices/systems
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United States of America Patent
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Sep 22, 1998
Grant Date -
N/A
app pub date -
Feb 16, 1996
filing date -
Mar 1, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
In accessing shared data in a shared storage device from a plurality of systems, the access is prevented from concentrating on one system without the necessity of exclusive control such as a lock mechanism, etc. Predetermined shared data in a network is all updated by a predetermined shared data updating unit in a first data processing device. The update result is written by a version data writing unit to the update storage device. If the predetermined shared data is referred to in the predetermined shared data referring unit in the second data processing device, the referring operation is performed by the predetermined shared data reference control unit on the predetermined shared data of one version prior to the latest version in the shared storage device, thereby requiring no lock mechanism.
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