Replicating tracks from a first storage site to a second and third storage sites
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United States of America Patent
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May 26, 2020
Grant Date -
Apr 5, 2018
app pub date -
Nov 17, 2017
filing date -
Sep 12, 2012
priority date (Note) -
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Abstract
Provided are a computer program product, system, and method for replicating tracks from a first storage to a second and third storages. A determination is made of a track in the first storage to transfer to the second storage as part of a point-in-time copy relationship and of a stride of tracks including the target track. The stride of tracks including the target track is staged from the first storage to a cache according to the point-in-time copy relationship. The staged stride is destaged from the cache to the second storage. The stride in the cache is transferred to the third storage as part of a mirror copy relationship. The stride of tracks in the cache is demoted in response to destaging the stride of the tracks in the cache to the second storage and transferring the stride of tracks in the cache to the third storage.
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