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:
Oct. 10, 2017
Filed:
Feb. 13, 2014
Hitachi, Ltd., Tokyo, JP;
Motoyasu Takabatake, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
A data management apparatus for reducing the occurrence of garbage collection, and preventing deterioration in the performance of writing data into an SSD. The data management apparatus includes a data management unit which manages key-value data stored in the SSD, and a file management unit which creates a file of a predetermined size in accordance with a request from the data management unit, and manages the created file. The file management unit creates a file having a size of an integral multiple of a block in the SSD, the data management unit requests file management unit to write the key-value data to be stored in the file, and manages a number of the effective key-value data in each file by invalidating pre-update data of the updated key-value data and the deleted key-value data, and requests the file management unit to delete the file no longer storing the effective key-value data.