GridDaEn数据网格中的元数据预取与缓存策略

The Prefetching and Caching Strategy of Metadata in GridDaEn Data Grid

因数据网格系统部署在广域网环境,所以网络传输延时将成为影响其服务质量(QoS)的主要因素之一。在对预取技术进行了深入细致的探讨之后,本文利用空间换取时间的思想提出了一种元数据的预取与缓存策略。考虑到Grid-DaEn系统中元数据自身的特点,还提出了一种新颖的元数据预取算法DHMP。

For Data Grid system is deployed in wide-area network environment, network-delay becomes one of the major limiting factors of QoS. After further discussing of prefetching method, we employ space-exchange-time method and then put forward a kind of metadata-based prefetching and caching strategy. In addition, considering the specific characteristic of the metadata in GridDaEn system, we propose a novel kind of profetehing method called DHMP.