Nokia Siemens Networks Oy

Gerald Neitzert

Phuoc Tran-Gia

Wolfgang Scheidl

Frank-Uwe Andersen

Simon Oechsner

Tobias Hoβfeld

Kurt Tutschku

Hans-Ulrich Schoen

Michael Duelli

Tobias Hoßfeld

A query message is received at a first server of a plurality of servers of a first server type, at least part of data contained in the query message is transformed to a transforming result, based on the transforming result and a first lookup table at said first server, a storage location of a respective second lookup table at one of said plurality of servers of said first type is determined, the respective second lookup table is accessed at the determined storage location of the respective second lookup table at one of said plurality of servers of said first type, and an indicator indicating a storage location of data requested by the query message is retrieved from the respective second lookup table.

Query routing in distributed database system

A state change in a network comprising a master server among a plurality of servers is determined, at the master server, a first lookup table is calculated, said first lookup table indicating respective partitions of a second lookup table distributed among active servers of said plurality of servers, the calculated first lookup table is distributed to each active server, and based on the first lookup table, at the master server, a modified partition of the second lookup table is generated.

Distributed database system using master server to generate lookup tables for load distribution

Growing community of inventors

Wiesloch, Germany

Gerald Neitzert