"The person you're quoting, in fact, said they were doing MR jobs over billions of keys" Ctrl-F billions and found one match in the post I was quoting. No othe

"The person you're quoting, in fact, said they were doing MR jobs over billions of keys" Ctrl-F billions and found one match in the post I was quoting. No other reference to very large MR jobs in the post quoted. "At Showyou, we're also building a custom backend called Mecha which integrates Riak and SOLR, specifically for this kind of analytics over billions of keys. We haven't packaged it for open-source release yet" So the OP is supposed to use an unreleased experimental custom backend to do his big mapreduce jobs?