Patent ID: 8423727
Filing Date: 2013-04-16
Classification: G06F

Abstract:
1. A method of managing data location of a plurality of files in a storage system having a mixed volume which includes a plurality of pages having a fixed page size, the pages belonging to different tiers, the method comprising: mapping the pages of different tiers to storage devices of different speeds in the storage system, the storage devices of different speeds including at least a high speed storage device corresponding to a high tier page and a low speed storage device corresponding to a low tier page; and for each file that is a large file which is larger in size than the page size, performing sub-file tiered management on the large file to assign the large file among pages of different tiers according to access characteristics of different portions of the large file by matching the access characteristics of each portion of the large file with a corresponding tier of the assigned page of the mixed volume.