PARALLEL DESTAGING WITH REPLICATED CACHE PINNING
First Claim
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1. A method, comprising:
- identifying non-destaged first data in a write cache; and
upon detecting second data in a master read cache;
pinning the second data to the master and one or more backup read caches;
calculating, using the first data stored in the write cache and the second data stored in the master read cache, one or more parity values; and
destaging the first data and the one or more parity values.
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Abstract
Methods, apparatus and computer program products implement embodiments of the present invention that include identifying non-destaged first data in a write cache. Upon detecting second data in a master read cache, the second data is pinned to the master and one or more backup read caches. Using the first data stored in the write cache and the second data stored in the master read cache, one or more parity values are calculated, and the first data and the one or more parity values are destaged.
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20 Claims
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1. A method, comprising:
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identifying non-destaged first data in a write cache; and upon detecting second data in a master read cache; pinning the second data to the master and one or more backup read caches; calculating, using the first data stored in the write cache and the second data stored in the master read cache, one or more parity values; and destaging the first data and the one or more parity values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A storage system, comprising:
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a memory configured to store data in a master read cache, a master write cache, at least one backup read cache, and at least one backup write cache; and a processor configured to identify non-destaged first data in the write cache, and upon detecting second data in a master read cache, to pin the second data to the master and one or more backup read caches, to calculate, using the first data stored in the master write cache and the second data stored in the master read cache, one or more parity values, and to destage the first data and the one or more parity values. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A computer program product, the computer program product comprising:
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a non-transitory computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising; computer readable program code configured to identify non-destaged first data in a write cache; and computer readable program code configured, upon detecting second data in a master read cache, to pin the second data to the master and one or more backup read caches, to calculate, using the first data stored in the write cache and the second data stored in the master read cache, one or more parity values, and to destage the first data and the one or more parity values.
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Specification