Apparatus, method and program product for determining the data recall order
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United States of America Patent
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Aug 11, 2015
Grant Date -
Jul 31, 2014
app pub date -
Apr 2, 2014
filing date -
Sep 29, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
To provide a technique for optimizing the processing order of recall requests in which the average latency time of a host apparatus is minimized. A storage manager accepts a request of the host apparatus for the recalling data from a tape library, and stores the request in a queue table. In response to storage of the request, the storage manager calculates the latency time for each request in all the conceivable execution orders for all the requests stored in the queue table. The storage manager determines the execution order which minimizes the total calculated latency time for all the requests including the active request, and rearranges the requests in the queue table.
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