Re: backup strategies

From: Csaba Henk (csaba-ml_at_creo.hu)
Date: 10/31/05

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    Date: Mon, 31 Oct 2005 17:09:02 +0100
To: freebsd-questions@freebsd.org

    On Mon, Oct 31, 2005 at 09:40:16AM -0600, Eric Schuele wrote:
    > How do snapshots work and how do they provide the consistency necessary
    > for a dump?
    [...]
    >
    > SoftUpdates are required on the filesystem.

    This sounds beautiful. I am amazed. I knew of softupdates, but they were
    always a shady corner of my understanding of BSD.

    So live fs dumping is based on the great hackery of softupdates. Fine,
    but in this case... shouldn't the man page make a mention of it?

    It just says that -L is ignored in case of unmounted/ro mounted fs-s,
    or if there is no proper .snap dir. But it doesn't say that it will be
    ignored if softupdates is not turned on...

    Going a bit off: which OS-es provide this live snapshot dumping
    capability? FreeBSD? FreeBSD >= 5.x ? *BSD ? Maybe something else?
    (AFAIK, softupdates is supported also in other members of the BSD
    family, yet the NetBSD dump manpage didn't have such a -L flag...) 

    -- 
Csaba Henk
My sense of humour is often too subtle to cope with getting smileyd.
Please don't take it personal.
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