发明名称 |
Prefetching source tracks for destaging updated tracks in a copy relationship |
摘要 |
A point-in-time copy relationship associates tracks in a source storage with tracks in a target storage. The target storage stores the tracks in the source storage as of a point-in-time. A write request is received including an updated source track for a point-in-time source track in the source storage in the point-in-time copy relationship. The point-in-time source track was in the source storage at the point-in-time the copy relationship was established. The updated source track is stored in a first cache device. A prefetch request is sent to the source storage to prefetch the point-in-time source track in the source storage subject to the write request to a second cache device. A read request is generated to read the source track in the source storage following the sending of the prefetch request. The read source track is copied to a corresponding target track in the target storage.
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申请公布号 |
US8566530(B2) |
申请公布日期 |
2013.10.22 |
申请号 |
US201113189329 |
申请日期 |
2011.07.22 |
申请人 |
BENHASE MICHAEL T.;GUPTA LOKESH M.;INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
BENHASE MICHAEL T.;GUPTA LOKESH M. |
分类号 |
G06F13/28 |
主分类号 |
G06F13/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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