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:
Mar. 23, 2021
Filed:
Oct. 20, 2016
Hitachi, Ltd., Tokyo, JP;
Yuko Matsui, Los Gatos, CA (US);
Mitsuo Hayasaka, Tokyo, JP;
Christopher James Aston, High Wycombe, GB;
Jonathan Smith, Bracknell, GB;
James Gibbs, Wokingham, GB;
Daniel Picken, Sunnyvale, CA (US);
Simon Crosland, Woking, GB;
Hieu Hanh Le, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
In a distributed storage of data objects in a cluster system, a data object is distributed across a group of node apparatuses in units of data blocks. For each child object, the metadata structure of the respective child object is stored to one of the node apparatuses of the group of node apparatuses for managing locations of data blocks of the data object and includes a root metadata node and one or more direct metadata nodes, optionally further including one or more indirect metadata nodes; and the metadata structure of the parent object is distributed across the plural node apparatuses of the group of node apparatuses for managing locations of child objects of the data object and includes, on each node apparatus of the group of node apparatuses, a root metadata node and one or more direct metadata nodes, optionally further including one or more indirect metadata nodes.