Language Selection

English French German Italian Portuguese Spanish

The Btrfs file system

If the numerous articles published about this topic in the past few months are to be believed, Btrfs is the file system of the future for Linux and the file system developers agree: Btrfs is to be the "next generation file system" for Linux. The general consensus (not so much among developers, but among the general supporters of Btrfs) is that Btrfs is the ZFS for Linux (for example, according to Linux Magazine). While this may be disputable at present since the ZFS, designed by Sun Microsystems for the Solaris Operating System, is already in production use, while Btrfs is still highly experimental, the two file systems do have a lot in common. With its integrated volume management, checksums for data integrity,Copy on Write and snapshots, Btrfs offers a range of features unrivalled by any of the Linux file systems currently in production use.

It is, therefore, time to take a look at this next generation file system for Linux.

Fit for the future

As a 64-bit file system, Btrfs addresses up to 16 exabytes (16,384 petabytes) – both in terms of the maximum volume size and the maximum file size. This is considerably more than is addressed by Ext4 (1024 PBytes / 16 TBytes), matches Sun's ZFS and offers plenty of reserves for years to come. As a reference point, the Large Hadron Collider (LHC) at CERN, currently probably the producer of the largest amount of data worldwide, has about 20 PBytes of storage available – in a grid distributed across eleven data centres in Europe, North America and Asia.

rest here




More in Tux Machines

Firefox OS media-casting stick strikes Kickstarter gold

The first Firefox OS based media player has arrived on Kickstarter, in the form of a $25 open-spec HDMI stick that supports Chromecast-like content casting. The Matchstick, which has already zoomed past its Kickstarter campaign’s $100,000 funding goal, with 28 days still remaining, was teased back in June by Mozilla developer evangelist Christian Heilmann. The unnamed prototype was billed as an open source HDMI stick that runs Mozilla’s Linux-based Firefox OS and offers casting capabilities. Few details were revealed at the time except that the device used the same DIAL (DIscovery And Launch) media-casting protocol created by Netflix and popularized by Google’s Chromecast. Read more

Open source history, present day, and licensing

Looking at open source softwares particularly, this is a fact that is probably useful to you if you are thinking about business models, many people don't care about it anymore. We talk about FOSS, Free and Open Source Software, but if we really are strict there's a difference between free software and open source software. On the left, I have free software which most typically is GPL software. Software where the license insures freedom. It gives freedoms to you as a user, but it also requires that the freedoms are maintained. On the right-hand side, you have open source software which is open for all, but it also allows you to close it. So here we come back to the famous clause of the GPL license, the reciprocity requirement which says, "If I am open, you need to be open." So software that comes under the GPL license carries with it something that other people call a virus. I call it a blessing because I think it's great if all software becomes open. Read more

Leftovers: Software

Proprietary

today's howtos