I/O write request handling in a storage system
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United States of America Patent
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May 17, 2016
Grant Date -
Jul 10, 2014
app pub date -
Dec 18, 2013
filing date -
Jan 4, 2013
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Abstract
An I/O write request handling mechanism in a storage system comprising at least one normal storage device and at least one cache device is provided. For each received I/O write request, two parallel threads are created. A first thread attempts to execute the write operation using the at least one normal storage device without using the at least one cache device. A second thread monitors the first thread and is triggered to execute the write operation using the at least on cache device if the first thread has not finished the write operation within a given time threshold. In either case, an I/O write completion response is provided to the external device in order to avoid timing out of the write operation. The at least one cache device is freed from data written by the second thread if the first thread completes the write operation after the given time threshold.
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Patent Owner(s)
- INTERNATIONAL BUSINESS MACHINES CORPORATION
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Diederich, Michael | Mainz, DE | 23 | 98 |
Rueger, Erik | Mainz, DE | 182 | 727 |
Wolafka, Rainer | Mainz, DE | 45 | 390 |
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