Patent ID: 8645737
Filing Date: 2014-02-04
Classification: G06F,Y02D

Abstract:
1. A power-saving control apparatus for executing power-saving control of a storage apparatus, the power-saving control apparatus comprising: a first file migration processing unit configured to: obtain access logs for a plurality of files, which includes a plurality of first files having highest level of importance and a plurality of second files having lower level of importance than the highest level, stored in the storage apparatus; detect, for each of the files, a user access pattern in each of a plurality of time zones, the user access pattern indicating whether each of the files has been accessed in each of the time zones, based on the obtained access logs; create a group by grouping one or more first files having similar user access patterns based on the detected user access patterns of the respective first files in each of the time zones; allocate one or more second files to the group based on user access patterns of the one or more first files in each of the time zones and the plurality of second files; migrate the group, which includes the one or more first files and the one or more second files, to a different memory medium; and set a power-saving control schedule for the group, which includes the one or more first files and the one or more second files, and for each of the time zones based on the user access patterns of the one or more grouped first files in the group and not based on the user access patterns of the one or more second files in the group; and a power-saving control processing unit configured to execute power-saving control for each medium and for each of the time zones in accordance with the schedule set for the group and for each of the time zones.