%0 Conference Paper
%B In proceedings of International Symposium on Secure Virtual Infrastructures - ACSAC
%D 2012
%T DEDISbench: A Benchmark for Deduplicated Storage Systems
%A João Paulo
%A P. Reis
%A José Orlando Pereira
%A António Luis Sousa
%C Rome, Italy
%I Springer
%V 7566
%X <p>Deduplication is widely accepted as an effective technique for eliminating duplicated data in backup and archival systems. Nowadays, deduplication is also becoming appealing in cloud computing, where large-scale virtualized storage infrastructures hold huge data volumes with a significant share of duplicated content. There have thus been several proposals for embedding deduplication in storage appliances and file systems, providing different performance trade-offs while targeting both user and application data, as well as virtual machine images.</p> <p>It is however hard to determine to what extent is deduplication useful in a particular setting and what technique will provide the best results. In fact, existing disk I/O micro-benchmarks are not designed for evaluating deduplication systems, following simplistic approaches for generating data written that lead to unrealistic amounts of duplicates.</p> <p>We address this with DEDISbench, a novel micro-benchmark for evaluating disk I/O performance of block based deduplication systems. As the main contribution, we introduce the generation of a realistic duplicate distribution based on real datasets. Moreover, DEDISbench also allows simulating access hotspots and different load intensities for I/O operations. The usefulness of DEDISbench is shown by comparing it with Bonnie++ and IOzone open-source disk I/O micro-benchmarks on assessing two open-source deduplication systems, Opendedup and Lessfs, using Ext4 as a baseline. As a secondary contribution, our results lead to novel insight on the performance of these file systems.</p>
%8 September
%> https://haslab.uminho.pt/sites/default/files/jtpaulo/files/pp12.pdf