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:
Aug. 04, 2015
Filed:
Jun. 02, 2014
Pivotal Software, Inc., Palo Alto, CA (US);
King Lun Choi, Palo Alto, CA (US);
Jeffrey Ira Cohen, Sunnyvale, CA (US);
Caleb E. Welton, Foster City, CA (US);
Kenneth E. Sell, Sunnyvale, CA (US);
Milena Bergant, San Mateo, CA (US);
Pivotal Software, Inc., Palo Alto, CA (US);
Abstract
A process for upgrading a mirrored shared-nothing database system comprises a sequence of short well-defined idempotent steps, and at least one non-idempotent step involving transforming a master catalog. The upgrade process is managed and controlled by a state machine that has a persistent memory running on the master node. In the event of a failure or crash during an idempotent step, the process stops the database in the current state and repeats the step. If a failure or crash occurs during a non-idempotent step, the upgrade process is rolled back to the beginning and repeated.