SYSTEM FOR MAINTAINING CONSISTENCY ACROSS A DECENTRALIZED DATABASE CLUSTER AND METHOD THEREFOR

A system and method for maintaining consistency across a decentralized database cluster is presented. A database cluster can contain a plurality of database servers, each hosting a copy of the same database. In a system without a centralized coordinating server, a message queue can be used to simultaneously provide updates to each database server in the database cluster. A When a database server receives an index update message, it adds message to a queue indicating it has received the message and watches an index update node. Once every server in the cluster has added a message to the queue, it is known that every database server has received the message. The update can be performed for each server and the changes committed simultaneously. In such a manner, all database servers in the cluster perform an update at approximately the same time. Other embodiments also are disclosed.