Method to prevent I/O starvation of slower hosts in a multi-host environment
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United States of America Patent
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Apr 12, 2016
Grant Date -
Apr 10, 2014
app pub date -
Oct 4, 2012
filing date -
Oct 4, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A method, system and computer-usable medium are disclosed for managing storage control unit input/output (I/0) operations in a multi-host environment. A storage control unit sends a busy status message when it has exhausted its resources to process new I/O requests. Once the utilization of the storage control unit's resources has subsided to a predetermined upper utilization value, it sends an availability status message to a first predetermined number of host systems that are owed an availability status message. After the first predetermined number of availability status messages are sent, the storage control unit then waits for a predetermined period of time before sending a second predetermined number of availability status messages.
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