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Mon, 24 Mar 2008

BTRFS got subvolumes support.

Subvolumes are block devices on top of which btrfs can be created. This is first known filesystem in Linux which can be built on top of multiple block devices. Chris Mason renamed his unstable branch to really-really unstable because of that. It is possible to put devices into mirror or striping mode, although it is far from being clear from short mail description.

Although support for mirror and striping in filesystem is questionable feature, ability to create filesystem on top of multiple block devices with per-device allocation policies is a huge step in Linux filesystem development.

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