Download from
dumps.wikimedia.org is tragically slow, making any one-time
analysis impractical, but /data/scratch/tmp/mediacounts on Labs has a copy
of October data.
Nemo, that's really good information, thank you. I'm going to ask a
hypothetical and I haven't done my due diligence yet. If we kept the last
month of mediacounts data in the pageview API, would that be useful? That
way we might be able to find the space and it won't grow in an unbounded
way.