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    A very neat trick…
    Submitted by robot101 on Friday, June 28, 2002 – 00:41
    So, you have a spare 160Gb HDD and a 100Mbit fiber connection to your home. What do you do? Set up a daily Debian archive snapshotting system, of course! This is exactly what Fumitoshi UKAI did with his new snapshot.debian.net server. It uses pdumpfs to make a daily record of the state of the *entire* Debian archive…
    This means you can use an apt line like:

    deb http://snapshot.debian.net/archive/2002/06/20/debian unstable main contrib non-free
    or
    deb http://snapshot.debian.net/archive/date/last-week/debian unstable main contrib non-free

    to reference the archive on any day. This is immensely useful for going back to a version of a package before some breakage took place, or even for having the mirror in a static state for eg jigdo to be able to find all the files that existed when the CD image was generated.

    The other neat trick is that on a per-package basis it generates Packages.gz files, so with a line like:
    deb http://snapshot.debian.net/archive pool packagename1 packagename2
    you can track all the available versions of specific packages. This has a knock-on benefit that a woody user could track the latest sid version of a package (dependencies permitting).

    This is a *really* cool system, well done Ukai! And, I can’t believe you can get 100Mbit fiber to your home in Japan. 😛

    Category: News

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    Subject: Re: A very neat trick…
    Author: robot101
    Date: Saturday, 2002/06/29 – 02:21
    This is exactly the thing I was talking about. Jigdo does not like “moving targets”, but with this – it doesn’t need to try and deal with it. You can point it at first a local mirror, and then point it to this to patch in anything missing. So now anything becomes jigdo-able, sid, woody, CD images, DVD images, etc.
    [ return ]

     

    Subject: OT: jigdo is even scalable (was: Re: A very neat trick…)
    Author: iotasmall
    Date: Saturday, 2002/06/29 – 10:55
    After having a go on jigdo with some CD images and a (eventful) DVD image, I’m going to love jigdo and Ukai-san.

    Recreating a 650MB image from a local mirror is quite fast in about 10 or 15 mins. It’s even better on a 4.3GB image, which is less than half and hour. It wasn’t possible for me without Ukai-san’s kindness and good work. And thank you to Debian Planet, otherwise, where else I can find out the good News.

    Cheers

    Iota Small

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