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. 09, 2019
Filed:
Mar. 16, 2015
Hitachi, Ltd., Tokyo, JP;
Yasuo Watanabe, Tokyo, JP;
Hiroaki Akutsu, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Regarding a distributed storage system including a plurality of nodes, a first node among the plurality of nodes judges whether the same data as first data, which is written to a first virtual partial area managed by the first node from among a plurality of virtual partial areas, exists in the virtual partial area managed by another node among the plurality of nodes; when the same data as the first data exists in the other node, the first node executes inter-node deduplication for changing allocation of either one of logical partial areas for the first virtual partial area or the virtual partial area of the other node to which the same data is written, to the other logical partial area; and when I/O load on the first node after execution of the inter-node deduplication of the first virtual partial area and the predicted value is less than a first threshold, the first node executes the inter-node deduplication of a second virtual partial area managed by the first node from among the plurality of virtual partial areas obtained by dividing the virtual storage area.