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:
Jun. 05, 2018
Filed:
Apr. 24, 2015
International Business Machines Corporation, Armonk, NY (US);
Thomas P. Boldt, Markham, CA;
Sunil K. Sarin, Newton, MA (US);
Dirk A. Seelemann, II, Thornhill, CA;
Glenn P. Steffler, Markham, CA;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Consistency of replicated data copies with statement-based replication is provided without requiring transaction serializability. At a subordinate replication node, a transaction start message, replicated data modification statements, and a transaction commit message are received for a next committed transaction from a master replication node, wherein the transaction start message carries a master transaction identifier, an invisibility list consisting of identifiers of other master transactions that had started and not yet committed when this master transaction started, and an earliest invisible master transaction identifier. The master transaction identifier, invisibility list, and earliest invisible transaction identifier are mapped to subordinate transaction identifiers to preserve an order of transaction identifiers from the master replication node. A subordinate transaction is started with the mapped subordinate transaction identifier and with an invisibility list consisting of the mapped subordinate transaction identifiers for the master invisibility list for execution of the received data modification statements.