摘要
在数据网格应用中,数据会由于性能和可用性等原因进行复制.如何使数据复本合理分布以降低通信开销是数据网格系统需要解决的重要问题.本文针对一种简化的数据网格环境,考虑存储资源代理对数据的访问频率和代理间的网络性能,提出一种填空式数据副本分配算法(CDRDA).通过该算法得到的数据副本分配,构成多级虚拟存储架构.数据副本根据被存储资源代理访问的频率分布在访问开销小的节点上,从而使系统的整体访问效率达到近似最优.
Data replication is a general mechanism to improve performance and availability for data grid applications. Distributing data replica reasonably in large scale data grid systems can decrease communication cost and improve its performances. This paper proposes a new Calking Dynamic Replication Distribution Algorithm (CDRDA) considering the communication cost among storage resource brokers and the characteristic of data accessing. By the algorithm, data replica will be distributed as a multi-level virtual cache and saved at the node in which applications can acquires the average lower communication cost. At last, the performance of the algorithm and its applications are also introduced.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2006年第11期1951-1954,共4页
Acta Electronica Sinica
基金
上海高校网格e-研究院项目
关键词
数据网格
数据副本
通信开销
填空式
data grid
data replica
cost of communication
calking