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- Installation methods for multiple binary CDs
- --------------------------------------------
- This package provides three new methods to be used within dselect in
- order to access Debian binary packages stored across multiple binary CD
- ROMs. It will install itself into the methods directory from dselect
- so the user will be able to use them immediately.
- These are the three new methods:
- . Multiple binary CD-ROMs
- . Multiple binary CD-ROMs, accessed through NFS
- . Multiple binary CD-ROMs, pre-mounted
- Acquiring package data
- ---------------------
- Since this method is derived from the 'mounted' method the user is
- able to access up to five binary directories within 'dists/stable':
- . main
- . contrib
- . non-free
- . non-US
- . local
- The selected method will try to read the 'Packages.cd' file from each
- of these directories if it is available.
- Identifying the CD-ROM
- ----------------------
- A unique name is associated to each CD. This name should correspond
- with the label on the front of the CD. The name is also available on
- the CD, so the system can find out which CD is in the drive at any
- time.
- Installing the files
- --------------------
- At the beginning of the installation the 'multicd' package will sort
- the list of to-be-installed packages and install them CD by CD. If a
- different CD-ROM is required the user will be prompted to exchange
- the CD-ROM.
- Preparing multiple binary CD-ROMs
- ---------------------------------
- Since the 'multicd' methods need to know which packages are on which
- CD-ROMs one cannot use regular 'Packages' files. An additional data
- field "X-Medium:" is required. The first CD-ROM from the set should
- contain all 'Packages.cd' files. To be more convenient you should
- include the 'Packages.cd' files on all CD-ROMs. This ensures that
- you don't have to start with the first CD-ROM all the time.
- Additionally the package needs to gain information which CD-ROM is
- currently used. Thus each CD-ROM contains the file '.disk/info'
- which contains the symbolic name for the CD-ROM as specified by
- "X-Medium:".
- In order to be able to create the modified 'Packages.cd' files, you
- have to use the '-M medium' option of dpkg-scanpackages (supported
- in dpkg-dev >= 1.15.5).
- To split the 'main' distribution into two CD-ROMs you'll need to
- create a 'Packages.cd' file for each 'binary-$arch' directory.
- Afterwards you simply append the second one to the first one and
- put the resulting 'Packages.cd' file into both 'binary-$arch'
- directories.
- Sample Layout
- -------------
- CD1 .disk/info = "Debian GNU/Linux binary-i386"
- dists/stable/main/binary-all/
- binary-i386/Packages.cd.gz
- binary-i386/net/foo.deb
- contrib/binary-i386/Packages.cd.gz
- non-free/binary-i386/Packages.cd.gz
- non-US/binary-i386/Packages.cd.gz
- CD2 .disk/info = "Debian GNU/Linux contrib-i386"
- dists/stable/main/binary-i386/Packages.cd.gz
- contrib/binary-all/
- binary-i386/Packages.cd.gz
- binary-i386/net/foo.deb
- non-free/binary-i386/Packages.cd.gz
- non-US/binary-i386/Packages.cd.gz
- CD3 .disk/info = "Debian GNU/Linux non-free-i386"
- dists/stable/main/binary-i386/Packages.cd.gz
- contrib/binary-i386/Packages.cd.gz
- non-free/binary-all/
- binary-i386/Packages.cd.gz
- binary-i386/net/foo.deb
- non-US/binary-all/
- To re-generate the Packages file you have to chdir into
- 'dists/stable/$part' and issue 'dpkg-scanpackages' as follows. It's
- assumed that you use regular compressed overrides files in
- /pub/debian/indices.
- CD1: dpkg-scanpackages -M "Debian GNU/Linux binary-i386" \
- binary-i386 /pub/debian/indices/override.hamm.gz \
- dists/stable/ > binary-i386/Packages
- CD2: dpkg-scanpackages -M "Debian GNU/Linux contrib-i386" \
- binary-i386 /pub/debian/indices/override.hamm.contrib.gz \
- dists/stable/ > binary-i386/Packages
- CD3: dpkg-scanpackages -M "Debian GNU/Linux non-free-i386" \
- binary-i386 /pub/debian/indices/override.hamm.non-free.gz \
- dists/stable/ > binary-i386/Packages
- Please direct comments to Martin Schulze <joey@infodrom.north.de>
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