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快照作为保证存储系统数据安全性的重要技术已经得到越来越广泛的应用。然而,在面向海量数据的分布式文件系统中,快照技术在快照创建和快照恢复两个方面存在着高开销和低可扩展性的问题。因此,本文提出了一种面向分布式文件系统的可扩展数据快照技术,采用基于数据压缩的增量快照和恢复链路缩减的方法,实现了可扩展性的快照创建技术和快照恢复技术。通过与目前现有的快照技术相比较,本文从理论角度证明了该方法可以有效降低快照开销,从而实现可扩展的分布式文件系统数据快照。
Snapshots as an important technology to ensure the security of storage system data have been more and more widely used. However, in the distributed file system for massive data, the snapshot technology has the problem of high overhead and low scalability in terms of snapshot creation and snapshot recovery. Therefore, this paper presents a scalable data snapshot technology for distributed file system, which adopts scalable snapshot based on data compression and method of recovering the link to achieve scalable snapshot creation and snapshot recovery. Compared with the current snapshot technology, this paper proves that this method can effectively reduce the overhead of snapshot and achieve scalable snapshot of distributed file system data.