云存储日志文件系统中快照的设计与实现  

DESIGN AND IMPLEMENTATION OF SNAPSHOT SYSTEM IN CLOUD STORAGE LOG-STRUCTURED FILE-SYSTEM

作　　者：陈莉君[1] 康华[1] 贾威威[1] 

机构地区：[1]西安邮电大学,陕西西安710121

出　　处：《计算机应用与软件》2013年第7期204-208,共5页Computer Applications and Software

基　　金：陕西省教育厅自然科学基金项目(11JK1069)

摘　　要：在逐步分析云存储日志文件系统中快照机制的基础上,设计并实现了基于HLFS(Hadoop DFS log-structured File-system)云存储日志文件系统的快照系统。通过在HLFS中添加新的快照,从快照系统中就可以随时获取该快照的信息,并恢复该快照时的所有数据,使云存储系统能够及时地进行数据恢复,从而避免云存储中核心数据的丢失,保证云存储中数据的安全性。为尽可能提高云存储日志文件系统中快照系统的可扩展性与实用性,详细分析快照在云存储日志文件系统中的设计与实现,并结合其他快照,分析了HLFS快照的实现性能。Based on step-by-step analysing the snapshot mechanism in cloud storage log-structured file-system, we design and implement a snapshot system which is based on HLFS （ Hadoop log-structured file-system）. By adding new snapshots to HLFS, from the system the information of a snapshot can be acquired at anytime and all the data when the snapshot was taken can be recovered, this enables the cloud storage system to be able to make the data recovery timely so as to prevent the core data in cloud storage from missing, therefore the safety of data in cloud storage is guaranteed. To improve as much as possible the expandability and availability of snapshot system in cloud storage log- structured file-system, we analyse in detail the design and implementation of snapshot in cloud storage log-structured file-system, and analyse the implementation performance of HLFS snapshot as well in combination with some other snapshots.

关 键 词：云存储 日志文件系统 快照 

分 类 号：TP311.5[自动化与计算机技术—计算机软件与理论]