I'm building a web application that will allow users to generate ad hoc map reduce requests of arbitrary complexity and I'm worried that a poorly constructed request could lock up the whole database. I'm using the ruby driver (via MongoMapper) and I noticed that cursors already have a server-side timeout of ten minutes (I presume this applies to map reduce jobs?), and so I was wondering whether it would be possible to have the option to override this value on a per request basis instead?