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COPYING POINT-IN-TIME DATA IN A STORAGE TO A POINT-IN-TIME COPY DATA LOCATION IN ADVANCE OF DESTAGING DATA TO THE STORAGE
COPYING POINT-IN-TIME DATA IN A STORAGE TO A POINT-IN-TIME COPY DATA LOCATION IN ADVANCE OF DESTAGING DATA TO THE STORAGE
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机译:在将数据分派到存储中之前,将存储中的实时点数据复制到实时复制数据位置
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摘要
Provided are a computer program product, system, and method for copying point-in-time data in a storage to a point-in-time copy data location in advance of destaging data to the storage. A point-in-time copy is created to maintain tracks in a source storage unit as of a point-in-time. A source copy data structure indicates tracks in the source storage unit to copy from the storage to a point-in-time data location. An update to write to a source track is received and a determination is made as to whether the source copy data structure indicates to copy the source track from the storage to the point-in-time data location. The update is written to a cache. A copy operation is initiated to copy the source track from the storage to the point-in-time data location asynchronous before the source track is destaged from the cache to the storage unit.
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