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    SubjectRe: [PATCH v1 00/30] Ext4 snapshots
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    On Sat, Jun 11, 2011 at 1:51 AM,  <Valdis.Kletnieks@vt.edu> wrote:
    > On Thu, 09 Jun 2011 13:54:13 +0300, "Amir G." said:
    >
    >> Why do you keep saying 'backup only'?
    >> There is a huge difference between having long lived snapshots,
    >> like CTERA products have, and temporary snapshot for backup
    >> purpose (for which LVM is adequate).
    >
    > I must have blinked somewhere - I'm not convinced LVM is even "adequate" for
    > backup purposes.  In particular, how does an LVM-level snapshot deal with the
    > "metadata in memory" problem (basically the exact same problem as running fsck
    > on a disk partition that is already mounted)?
    >
    >

    It uses the filesystem freeze API.
    Same as ext4 snapshots.

    Amir.
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