Title:
COMPUTER SYSTEM AND DATA MANAGEMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2012/131781
Kind Code:
A1
Abstract:
The storage apparatus comprises a storage unit for storing data to be read and written by the host computer; and a control unit for controlling the writing of data into the storage unit, wherein the control unit deletes an entity of the data replicated to the archive apparatus from the storage unit and stubs the data; calls the stubbed data from the archive apparatus and temporarily stores the entity of the data according to a request from the host apparatus; and if an area where the entity of the stubbed data is stored in the storage unit among data storage areas of the storage unit is a predetermined capacity or less, migrates stub information concerning the stubbed data to a storage unit of another storage apparatus.
Inventors:
MIWA SHUSAKU (JP)
SAIKA NOBUYUKI (JP)
SAIKA NOBUYUKI (JP)
Application Number:
PCT/JP2011/001945
Publication Date:
October 04, 2012
Filing Date:
March 31, 2011
Export Citation:
Assignee:
HITACHI LTD (JP)
MIWA SHUSAKU (JP)
SAIKA NOBUYUKI (JP)
MIWA SHUSAKU (JP)
SAIKA NOBUYUKI (JP)
International Classes:
G06F17/30; G06F3/06
Foreign References:
| US20040049513A1 | 2004-03-11 | |||
| US6850959B1 | 2005-02-01 | |||
| JP2006164221A | 2006-06-22 | |||
| JP2009289252A | 2009-12-10 |
Attorney, Agent or Firm:
OHGA, Shinji et al. (Seafort Square Center Building, 16F, 2-3-12, Higashishinagawa, Shinagawa-k, Tokyo 02, JP)
Download PDF:
Claims: