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:
Nov. 13, 2007
Filed:
Jun. 30, 2004
Steven Richard Waterhouse, San Francisco, CA (US);
Sherif M. Botros, Redwood Shores, CA (US);
Olaf Manczak, Hayward, CA (US);
Patrick Gates, San Francisco, CA (US);
Jeremy Werner, San Francisco, CA (US);
Sacha Arnoud, San Francisco, CA (US);
Steven Richard Waterhouse, San Francisco, CA (US);
Sherif M. Botros, Redwood Shores, CA (US);
Olaf Manczak, Hayward, CA (US);
Patrick Gates, San Francisco, CA (US);
Jeremy Werner, San Francisco, CA (US);
Sacha Arnoud, San Francisco, CA (US);
Sun Microsystems, Inc., Santa Clara, CA (US);
Abstract
A method for recovery of data objects on a data storage system includes determining a list of layout map IDs that place data objects on a node of a data storage system. For each layout map ID, a list of object IDs associated with each of the data objects assigned the layout map ID is determined. For each object ID, a list of data object fragments associated with the object ID is determined. A determination is made whether each of the data object fragments is present on the node. If a data object fragment is not present on the node, the data object fragment is reconstructed on the data storage system. The method can be automatically implemented by each of one or more operational nodes of a distributed data storage system at configured time intervals, and/or upon the operational loss of a data storage structure of a node, or a node.