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Improvement of Deduplication Efficiency by Two-Layer Deduplication System

机译：两层重复数据删除系统提高重复数据删除效率

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摘要

This paper proposes a two-layer deduplication system for the backup process in an IT environment. The proposed system implements two chunk sizes in a descendent way and activates them simultaneously in a sequence. They eliminate duplicated parts among backup target data more efficiently than any conventional single-layer deduplication system. The system weakens a substantial trade-off between the deduplication rate and the performance, which is defined as the number of chunks reduced. Compared to a conventional approach, the proposed system provides an equivalent deduplication rate with much less performance degradation or more performance with less compensation of the deduplication rate. In addition, it achieves better stability of performance when small chunk sizes are used to manipulate heavily duplicated data and densely changed data. The positive effects of the proposed system are evaluated quantitatively and are compared to a conventional approach by using a simulation. The results are certified with a prototype machine.
机译：本文提出了一种用于IT环境中备份过程的两层重复数据删除系统。提出的系统以后代方式实现两个块大小，并按顺序同时激活它们。与任何传统的单层重复数据删除系统相比，它们更有效地消除了备份目标数据中的重复部分。该系统削弱了重复数据删除率和性能之间的实质性折衷，折衷率是减少的块数。与传统方法相比，所提出的系统提供了等效的重复数据删除率，而性能下降的幅度要小得多，而更多的性能则是对重复数据删除率的补偿较小。此外，当使用小块大小来处理大量重复的数据和密集更改的数据时，它可以实现更好的性能稳定性。所提出系统的积极影响被定量评估，并通过仿真与常规方法进行比较。结果通过原型机认证。

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