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SDFS: A File-System With Inline De-Duplication

Free Software

Published on 17 August 2011 08:50 AM EDT
Written by Michael Larabel in Free Software
8 Comments

ZFS is known for its de-duplication support and there are other file-systems (such as Dragonfly's HAMMER, plus work-in-progress support for Btrfs) that support this data compression feature of eliminating duplicate data. There's also a new project that we have just learned about which is SDFS, a file-system that offers inline de-duplication support.

Opendedup SDFS is a file-system that supports in-line and batch mode de-duplication on both Linux and Windows systems, along with VMware virtualized environments. This file-system claims it can reduce storage utilization by up to 90~95%, can de-duplicate more than a Petabyte of data, can de-dupe/re-dupe at a speed of more than 1GB/s, and can do this de-duplication process either locally, on the network, or in the cloud (including Amazon S3). In fact, SDFS is particularly suited for the cloud with focusing on VMware, Xen, and KVM. SDFS also supports file and folder snapshots. These claims are rather impressive, especially from an unheard of open-source project (they only have 18 Twitter followers).

Earlier this month they put out the SDFS file-system 1.0.8 feature for Windows and Linux. While the file-system is portable to Windows, to the dismay of some, this file-system is built atop FUSE, which Linus Torvalds argues is for toys and misguided people. This file-system requires Linux x86_64, FUSE 2.8+, at least 2GB of RAM, and even Java 7.

For those not familiar with data de-duplication, they have a page about it and more information on opendedup.org, including an SDFS architecture presentation. This user-space file-system is hosted at Google Code and is developed under the GNU GPLv2 license.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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