Richard Houser wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Thomas Backlund wrote:
> | From: Valéry Raulet
> |
> |
> |>Yes, done for First CD !
> |>Results ...
> |>
> |>Before:
> |>-rw-r--r-- 1 mantis mantis 729153536 sep 2 15:19
> |
> | MandrakeLinux-9.0rc1-CD1.i586.iso
> |
> |>After:
> |>-rw-r--r-- 1 mantis mantis 672619543 sep 2 15:19
> |
> | MandrakeLinux-9.0rc1-CD1.i586.iso.bz2
> |
> |>Not really miraculous !
> |>
> |
> |
> | Well that is about 8% saved space...
> |
> | So just for fun... Here goes ...
> | If the same is applied to all 3 CD:s, it would be a total saving of
> about
> | 150MB ...
> |
> | Translated to download speeds according to calculated theoretical
> maximum
> | ...
> | ( nicely put , eh... ;-) )
> |
> | ADSL 8Mbit - saves 2.6 minutes
> | ADSL 2Mbit - saves 10.3 minutes
> | ADSL 1Mbit - saves 20.6 minutes
> |
> | ADSL 512Kbit - saves 41.1 minutes
> | ADSL 256Kbit - saves 1 hour 22.3 minutes
> | ADSL/ISDN 128Kbit - saves 2 hours 44.6 minutes
> |
> | ISDN 64Kbit - saves 5 hours 29.2 minutes
> | Modem 56Kbit - saves 6 hours 16.2 minutes
> | Modem 33.6Kbit - saves 10 hours 27.0 minutes
> | Modem 28.8Kbit - saves 12 hours 11.5 minutes
> |
> | ----- Below this line is modems that is not so much in use anymore
> -----
> | Modem 14.4Kbit - saves 24 hours 23.1 minutes
> | Modem 9.6Kbit - saves 36 hours 34.6 minutes
> | Modem 2.4Kbit - saves 146 hours 18.4 minutes
> |
> | I used to have a simple 56K modem before, and it's download speed was
> | between the 28.8K and 56K, so time saved would have been 6 - 12 hours.
> |
> | Multiply that by 7 (4 betas, 2 rc, one distribution...) and you get
> | a saving of 42 - 84 hours... NICE, huh...
> |
> | And if you dont care about the time,
> | what about the servers / mirrors saved bandwith ?
> |
> | Say 150MB saved, multiply by 7, and you will get 1 GB saved per user...
> | Multiply that by all relevant users, and you get BIG SAVINGS ...
> |
> | Of course building/maintaining a rsync type of system,
> | (transfer only changed parts), would save even more bandwidth...
> |
> | (This function has already been discussed here in cooker,
> | pointing out the problems that exists or may arise, but problems
> | are to be solved, aren't they ... ;-) )
> |
> | Thomas
> |
> |
> |
> |
> |
> | *** Tämä viesti on VirusTarkistettu INRITEL OY:n postipalvelimella!!
> ***
> |
>
> Please keep in mind that the first CD is not a good representation of
> the entire distro. The first CD tends to have most all the uncompressed
> content as it must run the installer, etc. I submitted a post here
> which seems to have vanished in cyberspace, but if you look at the
> cooker distribution, you will see about 1.9GB of RPMS and about 2.0GB
> total files. As "du -s -h" only reports to the nearest 100MB in this
> range, that uncompressed content would almost perfectly coincide with
> the savings shown on this first disc. If you try this on the second or
> third discs, etc, you would get extremely minimal savings. Also, each
> end user would need aabout 750MB extra free space at a time (assuming
> someone makes a script to delete the bz2 of each after the expansion)
> and then a couple hours for the decompression.
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.0.6 (GNU/Linux)
> Comment: For info see http://www.gnupg.org
>
> iEYEARECAAYFAj14HQ0ACgkQUMkt1ZRwL1MKMQCcCi22L2fqJnOwEuW16RVgQ3ay
> jo8AoJe6b7VN4KYgVV2KnJvThmjClAhZ
> =0Nm/
> -----END PGP SIGNATURE-----
>
>
You're right,
here is the complete results :
729153536 MandrakeLinux-9.0rc1-CD1.i586.iso
672619543 MandrakeLinux-9.0rc1-CD1.i586.iso.bz2
733609984 MandrakeLinux-9.0rc1-CD2.i586.iso
722260782 MandrakeLinux-9.0rc1-CD2.i586.iso.bz2
575209472 MandrakeLinux-9.0rc1-CD3.i586.iso
567350153 MandrakeLinux-9.0rc1-CD3.i586.iso.bz2
As you can see only first iso has interesting savings (about 55 MB), for
the next two, not really interesting.
And as you said, It take times to uncompress and you need more space for
doing it.
So saving 80 MB on about 2030 MB make less than 4 % savings.
conclusion : debian should compress its iso ou .deb files for saving
Internet bandwidth ;-)
Mantis.
