Data backup system with methods for stripe affinity backup to multiple archive devices
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United States of America Patent
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Sep 23, 1997
Grant Date -
N/A
app pub date -
Apr 10, 1996
filing date -
Sep 30, 1993
priority date (Note) -
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Abstract
A data backup system implements coordination between a Database Server and a Backup Server to produce a recoverable database dump. By utilizing a technique referred to as stripe affinity, a mechanism is disclosed for ensuring the integrity of a database backup made to multiple archive devices simultaneously. In addition, by utilizing stripe affinity, archived data may be reloaded from fewer archive devices than were used to make the original backup. A task scheduler mechanism allocates processor time among the tasks that comprise the backup system. In this way the I/O service tasks can process their event queues while the current set of allocation pages are also being processed.
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