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:
Jul. 29, 2014
Filed:
Mar. 04, 2013
Applicant:
Murakumo Corporation, Tokyo, JP;
Inventor:
Hiroyuki Yamada, Tokyo, JP;
Assignee:
Murakumo Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G06F 17/30 (2006.01);
U.S. Cl.
CPC ...
G06F 17/30289 (2013.01); G06F 17/30008 (2013.01); G06F 17/30345 (2013.01);
Abstract
A lower-level master node sends, to a higher-level master node, a write set expanded in its own memory including a shadow copy of its own database and a heap tuple map, and the higher-level master node that received the write set verifies whether the update has already been executed and sends the record of this update to the lower-level master node as a transaction log, whereby the database can be updated efficiently and consistently from the lower-level master node to the higher-level master node, and from the higher-level master node to the lower-level master node under its control.