"Btrfs v0.14 is now available for download," Chris Mason announced [1], adding, "please note the disk format has changed, and it is not compatible with older versions of Btrfs." The project has gained a new wiki home page [2] on the kernel.org domain, where it is explained, "Btrfs is a new copy on write filesystem for Linux aimed at implementing advanced features while focusing on fault tolerance, repair and easy administration. Initially developed by Oracle, Btrfs is licensed under the GPL and open for contribution from anyone." Regarding the latest release, Chris explained:
"v0.14 has a few performance fixes and closes some races that could have allowed corrupted metadata in v0.13. The major new feature is the ability to manage multiple devices under a single Btrfs mount. Raid0, raid1 and raid10 are supported. Even for single device filesystems, metadata is now duplicated by default. Checksums are verified after reads finish and duplicate copies are used if the checksums don't match."
Chris offered links to multi-device benchmarks [3] summarizing, "in general these numbers show that Btrfs does a good job at scaling to this storage configuration, and that is it on par with both HW raid and MD." Looking forward, he concluded, "next up on the Btrfs todo list is finishing off the device removal and IO error handling code. After that I'll add more fine grained locking to the btrees."
From: Chris Mason <chris.mason@...>
Subject: Btrfs v0.14 Released
[3]Date: Apr 29, 4:01 pm 2008
Hello everyone,
Btrfs v0.14 is now available for download. Please note the disk format has
changed, and it is not compatible with older versions of Btrfs.
For downloads and documention, please see the Btrfs project page:
http://btrfs.wiki.kernel.org [4]
The oss.oracle.com Btrfs project page will soon start redirecting here.
v0.14 has a few performance fixes and closes some races that could have
allowed corrupted metadata in v0.13. The major new feature is the ability to
manage multiple devices under a single Btrfs mount. Raid0, raid1 and raid10
are supported.
Even for single device filesystems, metadata is now duplicated by default.
Checksums are verified after reads finish and duplicate copies are used if the
checksums don't match.
Multi-device design details can be found here:
http://btrfs.wiki.kernel.org/index.php/Multiple_Device_Support [5]
And sample usage to create and add volumes can be found here:
http://btrfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices [6]
I'm putting up some benchmarks of the new multi-device code as the runs
finish:
http://btrfs.wiki.kernel.org/index.php/Multi-device_Benchmarks [7]
Next up on the Btrfs todo list is finishing off the device removal and IO
error handling code. After that I'll add more fine grained locking to the
btrees.
Thanks to everyone who has helped contribute to and test this release.
-chris
--
Related links:
- Archive of above thread [7]
