Locating file data from a mapping file

US9304821B2 · kind B2 · utility

Assignee

• Hitachi Data Systems Engineering UK Limited · GB

Inventors

• David Stephen Hartman · Santa Clara, US
• Thomas Andrew Glass · Santa Clara, US
• Shantanu Sinha · Sherghati, IN
• Ben Bernhard · Arlington, US
• Oleg Kiselev · Palo Alto, US
• James Mattly · Campbell, US

Key dates

• Filing date: Nov 17, 2014
• Grant date: Apr 5, 2016
• Expiry date: Nov 17, 2034

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L67/1097
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

In some examples, a distributed system may include a plurality of nodes with a file stored in a file system across the plurality of nodes. One of the nodes may receive a request for location data corresponding to a part of the file. For instance, the location data may be included in a mapping file, and the request may specify an offset of the mapping file. The mapping file may include locations of nodes storing parts of the file in the file system across the plurality of nodes, and the mapping file may have a plurality of parts corresponding to the parts of the file. In response to the request, the node may access the mapping file and send location data corresponding to the offset of the mapping file. The location data may indicate at least one of the nodes storing the part of the file.