A Query Optimization Strategy for Distributed Databases Based on the Principle of Minimizing Transmission Costs
Zhou Ping · Science and Technology of West China · 2007
Distributed query algorithm is the core part of the overall query optimization algorithm.Inquiries request will be divided into sub-query optimization tasks reasonably and sub-tasks is to make parallel execution.Distributed query optimization need to balance network traffic,response time,server load and a variety of factors,such as the complexity of algorithms.In reducing the volume of data transmission between nodes,this paper presents a global optimization algorithm between complexity and delay time.This paper conducted a detailed analysis of complex inquiries and join inquiries.Finally,it presents a semi-join-based query optimization algorithm and its advantages and disjdvantages.