摘要
在云存储系统中使用客户端元数据缓存,不仅可以减轻元数据服务器的压力,避免元数据服务器成为系统瓶颈,提高系统的可扩展性,而且可以降低客户端元数据操作的响应延迟,极大地提高客户端IOPS性能。本文对云存储系统客户端元数据缓存同步机制进行研究,提出了基于更新日志的元数据缓存同步策略,利用该策略替代了MassCloud云存储系统原先的元数据缓存完全同步策略。测试结果表明,新的缓存同步策略给MassCloud云存储系统带来了20～140倍的性能提升。
Client-side metadata cache is used in cloud storage system. It can not only reduce the work load of metadata server, solve the bottleneck prohlem of metadata server, and improve the expandability of cloud-storage system, hut also reduce the response latency of client-side metadata request, improve client-side IOPS-performanee greatly. This paper does research on synchronization mechanism of metadata caches in cloud storage system, puts forward the synchronization strategy based on change-log. This strategy is used to replace the original full-synchronization strategy in the cloud storage system named MassCloud. The results of test show that this stragety brings about 20-140 times performance improvement to MassCloud storage system.
出处
《电信科学》
北大核心
2011年第9期32-36,共5页
Telecommunications Science
基金
国家"863"计划资助项目(No.2008AA01A309)
国家自然科学基金资助项目(No.60603029)
关键词
云存储
元数据缓存
同步策略
更新日志
cloud storage,metadata cache,synchronization strategy, change-log
