Title:
The storage system using a real storage field dynamic allocation method
Document Type and Number:
Japanese Patent JP5986652
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent reduction of access performance of a distributed memory system by accessing via cross-over ownership to track mapping information formed as a hierarchical memory.SOLUTION: In assignment of a real storage area to a virtual volume, at first, a page is assigned from a pool, and thereafter, a track is assigned from the page. The page is composed of a plurality of tracks into which track data assigned at host write operation timing are stored sequentially from a top. Mapping information between the virtual volume and the page is stored in a control information page that differs from the track data, and the mapping information is stored in the control information page which could only be accessed by a microprocessor having an ownership of the virtual volume.
Inventors:
Kohei
Application Number:
JP2015024852A
Publication Date:
September 06, 2016
Filing Date:
February 12, 2015
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G06F3/06; G06F12/00
Domestic Patent References:
| JP2010086211A | ||||
| JP2011076572A |
Foreign References:
| US20100083120 |
Attorney, Agent or Firm:
Patent Business Corporation Daiichi International Patent Office