Subscribe to CIO Magazine »

Open source deduplication software released for Linux

Can integrate with other services like cloud storage

A new open source project, dubbed Opendedup, has appeared with the goal of creating a deduplication-based file system for Linux called SDFS.

The project’s developer Sam Silverberg says today’s deduplication solutions only solve the problem of storing deduplicated data, not reading and writing inline data.

SDFS is designed to support the needs of virtual environments including the VMware, Xen, and KVM hypervisors.

The filesystem can deduplicate inline (at a line speed of 150Mbps or greater) or periodically based on needs and this can be changed on the fly. Support for file or folder level snapshots is also a feature.

With support for deduplication at 4K block sizes, virtual machines data can be deduplicated and stored locally, across multiple nodes or in the cloud. It supports some 3TB of storage per gigabyte of memory.

A design goal was a distributed architecture and SDFS is scalable to eight petabytes of capacity with 256 storage engines, which can each store up to 32TB of deduplicated data. Each volume can be up to 8 exabytes and the number of files is limited by underlying file system.

The requirements for Opendedup are a 64-bit Linux distribution (it’s tested and developed on Ubuntu), Fuse 2.8 or greater, 2 GB of memory and Java 7.

Silverberg designed Opendedup to run in user space and be object-based because it would be platform independent, have a faster development cycle, easier to scale and cluster and to provide flexibility for integrating with other user space services like Amazon S3.

There is also the opportunity to leverage file system technologies like replication and snapshotting.

The latest release of SDFS, version 0.8.8 adds better I/O performance, scheduling of filesystem tasks, and a fix for a data corruption issue when removing unused deduplicated chunks.

The maximum file size it currently limited to 250GB with 4K chunk size.

Opendedup’s architecture consists of a SDFS Volume (one deduplicated file engine and one Fuse-based file system); a dedup file engine (manages file-level activities); a Fuse-ased file system; and a dedup storage engine which is the server-side service that stores and retrieves chunks of deduplicated data.

SDFS is licenced under the GPLv2. Windows support and block level replication are on the Opendedup roadmap.

Opendedup is online at and on the Google Code portal at:

Join the CIO Australia group on LinkedIn. The group is open to CIOs, IT Directors, COOs, CTOs and senior IT managers.

More about: Amazon, Google, KVM, Linux, Ubuntu, VMware
References show all





This is all very interesting I'm sure. But it would be nice, when writing articles or blogs like this, if the writer would define the subject of the article for "the rest of us". What the hell is "deduplication"? Makes no sense to me.

What is it like? You copy a file and then you uncopy it? Or you copy a music CD and then you uncopy the music CD????



Be wary of the website. It has a trojan in it!

Comments are now closed.
Related Coverage
Related Whitepapers
Latest Stories
Community Comments
Tags: file systems, Linux, open source, storage, Opendedup, deduplication
Latest Blog Posts
  • IDC MarketScape Excerpt: Worldwide Client Virtualization Software Assessment
    The rise of BYOD is creating governance and regulatory nightmares while providing end users with unprecedented flexibility and agility. While IT is still intrigued by the possibility of a better desktop management model and the operational savings client virtualization software could deliver, it is the increased governance and the ability to deliver desktops, applications, and data to any device that are driving today's purchases.
    Learn more »
  • Case Study: ETEL Limited
    Read how ETEL Limited, a pioneering design and manufacture business in New Zealand, managed to perfect their expansion into new markets by utilising an ERP system to support growth and provide “one source for truth” accessible to the entire organisation.
    Learn more »
  • How to Successfully Select an ERP System
    An Enterprise Resource Planning (ERP) system is a series of software applications that collect and compiles data from different departments to enhance collaboration and co-ordination within the business. If you’re looking to implement your first ERP system, or to upgrade from an existing system, this whitepaper offers eight simple steps for selection that will lead to long-term strategic success.
    Learn more »
All whitepapers
rhs_login_lockGet exclusive access to Invitation only events CIO, reports & analysis.
Salary Calculator

Supplied by

View the full Peoplebank ICT Salary & Employment Index

Recent comments