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:
Dec. 12, 2017
Filed:
Mar. 15, 2013
Cloudera, Inc., Palo Alto, CA (US);
Jonathan Ming-Cyn Hsieh, San Francisco, CA (US);
Cloudera, Inc., Palo Alto, CA (US);
Abstract
Systems and methods for checking for region consistency and table integrity problems and automatically repairing a corrupted HBase cluster. The methods and systems operate in a diagnostic mode and a diagnostic and repair mode. The methods include fixing table integrity problems, such as backwards table regions, table region holes, table region overlap, and the like to restore table integrity invariant. Once the table integrity has been restored, each row key resolves to exactly one region. The methods further include fixing region inconsistencies, such as bad region assignment, no region present in the meta table, region information not in the Hadoop Distributed File System (HDFS), and the like to restore region consistency invariant. The information in the HDFS is taken as ground truth and any meta table or assignment problems that are inconsistent with the HDFS is deemed wrong and removed.