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    SubjectRe: Backups done right (was [ANNOUNCE] Ext3 vs Reiserfs benchmarks)
    On Tue, 16 Jul 2002 stoffel@lucent.com wrote:

    > 3a. lock mirrored volume, flush any outstanding transactions, break
    > mirror.
    > --or--
    > 3b. snapshot filesystem to another volume.

    Good summary. The problem is that 3a either requires a double morror or
    leaving the f/s un mirrored, and 3b can take a very long time for a big
    f/s.

    In general mauch of this can be addressed by only backing up small f/s and
    using an application backup utility to backup the big stuff. Fortunately
    the most common problem apps are databases and and they include this
    capability.

    --
    bill davidsen <davidsen@tmr.com>
    CTO, TMR Associates, Inc
    Doing interesting things with little computers since 1979.

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