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CREATING A BUFFER POINT-IN-TIME COPY RELATIONSHIP FOR A POINT-IN-TIME COPY FUNCTION EXECUTED TO CREATE A POINT-IN-TIME COPY RELATIONSHIP
CREATING A BUFFER POINT-IN-TIME COPY RELATIONSHIP FOR A POINT-IN-TIME COPY FUNCTION EXECUTED TO CREATE A POINT-IN-TIME COPY RELATIONSHIP
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机译:为执行以创建即时点复制关系的即时点复制功能创建缓冲即时点复制关系
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摘要
Provided are a method, system, and computer program product for creating a buffer point-in-time copy relationship for a point-in-time copy function executed to create a point-in-time copy relationship. A point-in-time copy function is initiated to create a new point-in-time copy relationship from a source volume comprising a first volume to a target volume comprising a second volume. Detection is made that the target volume of the new point-in-time copy relationship is a source volume of a first pre-existing point-in-time copy relationship having as a target volume a third volume. Detection is also made that the target volume of the first pre-existing point-in-time copy relationship is a source volume of a second pre-existing point-in-time copy relationship having as a target volume a fourth volume. A buffer point-in-time copy relationship having a source volume comprising the target volume of the first pre-existing relationship and a target volume comprising a fifth volume is created in response to detecting that the target volume of the new point-in-time copy relationship is the source volume of the first pre-existing point-in-time copy relationship and the detected that the target volume of the first pre-existing point-in-time copy relationship is the source volume of the second pre-existing point-in-time copy relationship.
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