Re: Request for Comments: libarchive, bsdtar

From: Brooks Davis (brooks_at_one-eyed-alien.net)
Date: 01/14/04

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    Date: Wed, 14 Jan 2004 13:27:38 -0800
To: Poul-Henning Kamp <phk@phk.freebsd.dk>

    On Wed, Jan 14, 2004 at 10:22:02PM +0100, Poul-Henning Kamp wrote:
    > In message <40059DFB.9000904@mail.ru>, Vladimir Dozen writes:
    > >ehlo.
    > >
    > >> If you become a bored person requiring entertainment, it might be quite
    > >> interesting to create a read-only tarfs for use as a root file system
    > >> loaded in an md device.
    > >
    > > I'm just curious: is it possible to write a GEOM class to mount
    > > a given tar as a FS in R/O mode (using libarchive, I mean)?
    >
    > That would be a filesystem, not a GEOM class.
    >
    > And yes it would be. Part of the trouble is directory searches
    > where you need to build some kind of index in order to not have
    > to run through sequentially all the time.

    For cases where you know you're going to be using the archive as a file
    system, you might be able to cheat a bit by creating a special file
    containing an efficent index of the contents of the archive. That would
    let you avoid keeping everything in memory and rescanning the disk
    constantly.

    -- Brooks 

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