Thanks to the LLVM Foundation and Tanya, the apt repository is now back:
It will take a few days before all the builds go green .
Please update your configurations.
 The same build infra is still used but the builds were failing
because using llvm.org/apt too.
Nice! Thanks everyone!
Are we filtering multiple hits, or are we just assuming people will be
using local caches?
What are you thinking about?
For now, the current configuration is a stupid apache serving the deb files.
In the other thread, I think it was reported that the problem is too
many connections and people weren't using local cache, even though
they're mostly getting the same files on build systems.
Putting up another server up, unless it's bigger than the previous
one, won't hold for the same reason.
I suggested something like mod_evasive in a very friendly mode could
at least hold off the worst "offenders" and not break repo for
everyone else. Those offenders could them install / configure a local
But it was just a suggestion, if you don't think it's needed, that's fine.
I’m getting this warning on Ubuntu 16.04 about apt.llvm.org repo:
W: The repository ‘http://apt.llvm.org/xenial llvm-toolchain-xenial Release’ is not signed.
N: Data from such a repository can’t be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.