Checkpoint/resume/restart safe methods in a data processing system to establish, to restore and to release shared memory regions
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United States of America Patent
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May 20, 2008
Grant Date -
Jun 29, 2006
app pub date -
Dec 16, 2004
filing date -
Dec 16, 2004
priority date (Note) -
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Abstract
A method is provided in which checkpointing operations are carried out in data processing systems running multiple processes which employ shared memory in a manner which preserves data coherence and integrity but which places no timing restrictions or constraints which require coordination of checkpointing operations. Data structures within local process memory and within shared memory provide the checkpoint operation with application level information concerning shared memory resources specific to at least two processes being checkpointed. Methods are provided for establishing, restoring and releasing shared memory regions that are accessed by multiple cooperating processes.
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