Patent ID: 8386515
Filing Date: 2013-02-26
Classification: G06F

Abstract:
1. A method for persistent querying in a federated database system having a plurality of connectable database management system nodes, each database node having at least one database, the method comprising: receiving a query at a first database node; propagating the query from the first database node to other database nodes in the federated database system; receiving, by the first database node, query results sets from at least one responding node, wherein at least one responding node satisfying the query: subscribing, by the first database node, to topic identifiers for publications of subsequent messages from the responding database nodes; and optimizing a route from the responding node to the first database node by periodically re-issuing the query from the first database node to other database nodes in the federated database system and wherein the responding node further defines a new topic identifier associated with the re-issued query.