The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 2018
Filed:
Jul. 24, 2014
Hitachi, Ltd., Tokyo, JP;
Sachie Tajima, Tokyo, JP;
Tadashi Takeuchi, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
A computer system includes: a physical resource including a memory; a virtualization mechanism that provides a virtual computer to which the physical resource is allocated; and a cache state management mechanism that manages a cache state of the virtual computer. The virtualization mechanism provides a first virtual computer and a second virtual computer. The cache state management mechanism manages the cache state of each of the first virtual computer and the second virtual computer. When the cache state management mechanism detects transition of the cache state in a state where a memory area allocated to a cache of the first virtual computer and a memory area allocated to a cache of the second virtual computer include duplicated areas storing same data, the virtualization mechanism releases the duplicated area in one of the first virtual computer and the second virtual computer.