Mailinglist Archive: opensuse (4446 mails)

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Re: [opensuse] downloading with aria2c problem - checksum error, image destroyed!
  • From: B.Weber@xxxxxxxxxxxxx
  • Date: Fri, 8 Dec 2006 13:44:09 -0000 (GMT)
  • Message-id: <54092.194.201.25.22.1165585449.squirrel@xxxxxxxxxxxxxxxxxxx>
> It should not happen. Metalink is supposed to use methods to avoid
> download errors. So they say, at least. I very much doubt I'll ever use it
> again nor recomend it.

Correct me if I'm wrong, but I don't think http provides for the
possibility of checksuming individual chunks of a file. Which would
explain the unusually high incidence of corrupt downloads I'm seeing among
people using metalink enabled clients to download 10.2.

If you download chunks from 50 different mirrors and just one of the
mirrors has a corrupted copy, then your entire download will be corrupt,
downloading from lots of mirrors greatly increases the chance of a corrupt
download.

So downloading 4gb isos using a metalink enabled client using lots of
mirrors does not seem like a good idea, especially as any single mirror
will likely max out whatever consumer bandwidth you have.

Bittorrent enables downloads from many sources, but with bittorrent each
chunk is checked, so you only have a small amount to re-download on
corruption.

_
Benjamin Weber
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