Query execution and optimization with autonomic error recovery from network failures in a parallel computer system with multiple networks
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United States of America Patent
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Jul 22, 2014
Grant Date -
Jul 18, 2013
app pub date -
Mar 5, 2013
filing date -
Aug 7, 2007
priority date (Note) -
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Abstract
A database query execution monitor determines if a network error or low performance condition exists and then where possible modifies the query. The query execution monitor then determines an alternate query execution plan to continue execution of the query. The query optimizer can re-optimize the query to use a different network or node. Thus, the query execution monitor allows autonomic error recovery for network failures using an alternate query execution. The alternate query execution could also be determined at the initial optimization time and then this alternate plan used to execute a query in the case of a particular network failure.
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