Managing a cache in a multi-node virtual tape controller
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United States of America Patent
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Jun 21, 2016
Grant Date -
Sep 17, 2015
app pub date -
May 30, 2015
filing date -
Jan 25, 2010
priority date (Note) -
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Abstract
A method according to one embodiment includes outputting a first alert when a cache free space size is less than a first threshold and entering into a warning state, and outputting a second alert when the cache free space size is less than a second threshold and entering into a critical state. At least one scratch volume is deleted when in the critical state, the scratch volume chosen based on at least one of: a length of time the scratch volume has been designated scratch, a priority level of the information stored on the scratch volume, and a scratch delay value associated with the scratch volume.
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