Considering a frequency of access to groups of tracks and density of the groups to select groups of tracks to destage
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United States of America Patent
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Nov 6, 2018
Grant Date -
Mar 30, 2017
app pub date -
Sep 29, 2015
filing date -
Sep 29, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
Provided are a computer program product, system, and method for considering a frequency of access to groups of tracks and density of the groups to select groups of tracks to destage. One of a plurality of densities for one of a plurality of groups of tracks is incremented in response to determining at least one of that the group is not ready to destage and that one of the tracks in the group in the cache transitions to being ready to destage. A determination is made of a group frequency indicating a frequency at which tracks in the group are modified. At least one of the density and the group frequency is used for each of the groups to determine whether to destage the group. The tracks in the group in the cache are destaged to the storage in response to determining to destage the group.
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