| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide technique for managing an object based tier to improve allocation of media to unallocated area. <P>SOLUTION: In one embodiment, a method of allocating an area of a logical volume to an unallocated area of a virtual volume for a write command comprises: calculating an object location of an object based on the write command and an object allocation information, the write command containing a virtual volume name and a virtual volume address of a virtual volume; selecting a tier from a plurality of tiers based on the calculated object location and an object and tier definition information; selecting a media type from a plurality of media types based on the selected tier and a tier and media definition information; and selecting a logical volume from a plurality of logical volumes based on the virtual volume specified by the write command, the object allocation information, a pool information, and the selected media type. <P>COPYRIGHT: (C)2011,JPO&INPIT |
