MapReduce doesn’t have a monopoly on distributed query execution.
You also don't need to distribute MapReduce. A friend of mine worked at a company that wanted to use MapReduce, but didn't want to maintain a large datacenter, so they ran a bunch of VMs on a single machine, and ran MapReduce on those VMs.
This was one of the stupidest solutions I have ever heard of, and when I told this story at the Goo Factory, no one believed me.
