Patent ID: 7406461
Filing Date: 2008-07-29
Classification: G06F,Y10S

Abstract:
1. A database system for processing a query request, comprising: at least one master node that communicates a request over a communication channel, a first slave node and a second slave node each coupled to the at least one master node, each of the first and second slave nodes receiving the request over the communication channel; the second slave node receives the first notification; the second slave node communicates a second notification over the communication channel indicating that the second slave node is processing the request; the first slave node receives the second notification; the first or second slave node initiates an arbitration to determine whether the first or second slave node is entitled to process the request; and a winner of the arbitration between the first and second slave nodes continues processing the request and a loser of the arbitration between the first and second slave nodes ceases processing the request.