The whole repository including ISOs is at rsync://rsync.altlinux.org/ALTLinux/ [189Gb as of 2007–09–22], parts of it are updated roughly daily. There are also distinct parts specifically worth mirroring, namely latest stable release (4.0) and current/unstable branch (Sisyphus). Overall picture is currently like this:
The “wholesale” location is here:
rsync://rsync.altlinux.org/ALTLinux/ is 189G as of 2007–09–22 including four releases (since 2004) and daily-updated unstable (Sisyphus/)
Latest stable release is here (uses hardlinks):
rsync://rsync.altlinux.org/ALTLinux/4.0/
Its ISOs are here (included in the above):
Updates are maintained here:
rsync://rsync.altlinux.org/ALTLinux/updates/ — ca. 3.5Gb as of 2007–09–24
Unstable branch lives at:
rsync://rsync.altlinux.org/ALTLinux/Sisyphus/ — 32Gb as of 2007–09–24 (incl. orphaned/obsolete which aren't usually needed)
TODO: add year-over-year growth rates observed
You might want to specificaly exclude known ancient (e.g. there is Compact/2.3 and Master/2.4 there, current releases published like 4.0/{Desktop,Server,branch} which really is more logical) — or too specific — parts of the archive:
and probably '*orphaned/*' although that's rather limbo than end-of-life for a package.
The corresponding rsync commandline addition is:
--exclude '*GIVC/*' --exclude '*Castle/*' --exclude '*Compact/*' --exclude '*Junior/*' --exclude '*Master/*' --exclude '*Mozilla/*' --exclude '*OpenOffice/*' --exclude '*unsupported/*' --exclude '*obsolete/*'