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:
Jan. 11, 2022
Filed:
Feb. 10, 2020
Fujitsu Limited, Kawasaki, JP;
Kazuichi Oe, Yokohama, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
An apparatus includes a memory that stores information managing whether a writing access to a storing region of a first storing device is present or absent for each of second-sized partial regions obtained by dividing a first-sized storing region by a given value; and a processor configured to: in response to an instruction to migrate first-sized target data from the first storing device to a second storing device having an access speed lower than that of the first storing device, when a number of accessed partial regions in a storing region of the target data is larger than a threshold, migrating the target data in a unit of the first size; otherwise migrating data in the accessed partial regions in a unit of the second size; calculating a first/second migration time periods that the migrations of the first/second size takes; and changing the threshold based on the calculating.