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    SubjectRe: [ANNOUNCE] Btrfs: a copy on write, snapshotting FS
    >>>>> "Chris" == Chris Mason <> writes:

    Chris> After the last FS summit, I started working on a new filesystem
    Chris> that maintains checksums of all file data and metadata. Many
    Chris> thanks to Zach Brown for his ideas, and to Dave Chinner for his
    Chris> help on benchmarking analysis.

    Chris> The basic list of features looks like this:

    Chris> * Extent based file storage (2^64 max file size)
    Chris> * Space efficient packing of small files
    Chris> * Space efficient indexed directories
    Chris> * Dynamic inode allocation
    Chris> * Writable snapshots
    Chris> * Subvolumes (separate internal filesystem roots)
    Chris> - Object level mirroring and striping
    Chris> * Checksums on data and metadata (multiple algorithms available)
    Chris> - Strong integration with device mapper for multiple device support
    Chris> - Online filesystem check
    Chris> * Very fast offline filesystem check
    Chris> - Efficient incremental backup and FS mirroring

    So, can you resize a filesystem both bigger and smaller? Or is that
    implicit in the Object level mirroring and striping?

    As a user of Netapps, having quotas (if only for reporting purposes)
    and some way to migrate non-used files to slower/cheaper storage would
    be great.

    Ie. being able to setup two pools, one being RAID6, the other being
    RAID1, where all currently accessed files are in the RAID1 setup, but
    if un-used get migrated to the RAID6 area.

    And of course some way for efficient backups and more importantly
    RESTORES of data which is segregated like this.

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      Last update: 2007-06-13 05:49    [W:0.020 / U:50.616 seconds]
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