Patent ID: 8762995
Filing Date: 2014-06-24
Classification: G06F

Abstract:
1. A computing system, comprising: a plurality of computing units; a tiered storage unit connected to the plurality of computing units, the tiered storage unit comprising a first storage medium and a second storage medium having a transfer rate lower than a transfer rate of the first storage medium; a first system management unit having a computing unit management server connected to the plurality of computing units and the tiered storage unit; and a second system management unit having a storage management server connected to the plurality of computing units and the tiered storage unit, the second system management unit having usage information which is indicative of a usage of the first storage medium; wherein the second system management unit is configured: wherein the second system management unit is further configured: wherein a second period, between a current time and second reference time for conducting a staging to migrate data from the second storage medium to the first storage medium, is shorter than the first period for conducting the destaging, and the data to be migrated from the second storage medium to the first storage medium in the second period includes data on a job to be executed before the second reference time.