CAJ | 학술논문

针对云环境下的应用系统规模越来越庞大的问题，提出了一种扩展性较好的数据库服务器扩展模型。该模型架构分为三个层次：逻辑SQL处理层、DA和CP层、物理数据库层。采用了读/写分离策略、数据库复制、负载均衡策略、服务器群集策略等技术，提出基于虚拟节点的加权一致性哈希负载均衡算法，根据物理节点的性能权值计算分配的虚拟节点数。通过仿真实验表明，该模型在负载均衡的性能上具有优势，在数据库层具有较好的扩展性。
침대운배경하적응용계통규모월래월방대적문제，제출료일충확전성교호적수거고복무기확전모형。해모형가구분위삼개층차：라집SQL처리층、DA화CP층、물리수거고층。채용료독/사분리책략、수거고복제、부재균형책략、복무기군집책략등기술，제출기우허의절점적가권일치성합희부재균형산법，근거물리절점적성능권치계산분배적허의절점수。통과방진실험표명，해모형재부재균형적성능상구유우세，재수거고층구유교호적확전성。
For the problem of increasingly large scale application systems under cloud computing,propose a database server ex-tensions model with better scalability. The architecture is divided into three levels,logical SQL processing layer,DA and CP layer,physical database layers. Use a read/write separation strategies, database replication, load balancing strategies, server cluster strategies and other technologies,and propose the weighted consistent hashing load balancing algorithm based on virtual node. According to the performance weight of physical node,compute the number of virtual nodes. The simulation experiments demonstrate that the proposed model improves system performance,and has good scalability in the database layer.