METHOD AND APPARATUS FAULT TOLERANT SHARED MEMORY
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United States of America Patent
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Issued Date -
Sep 26, 2002
app pub date -
Dec 15, 1998
filing date -
Dec 15, 1998
priority date (Note) -
Abandoned
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Abstract
A method and apparatus for providing paired or shadowed shared memory within UNIX and UNIX-like environments is provided. For the present invention shared memory segments, established using System V-like shared memory commands, are registered or paired. Once paired checkpointing operations may be performed by pushing or pulling data between paired segments. These checkpointing operations may be synchronous or asynchronous. The present invention also allows client processes to determine the status of shared memory segments and the status of checkpointing requests.
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