I believe MongoDB's server side functions allow you to create an atomic grouping of operations.. i.e. store a function and call it by db.eval() See the followi

I believe MongoDB's server side functions allow you to create an atomic grouping of operations.. i.e. store a function and call it by db.eval() See the following: http://www.mongodb.org/display/DOCS/Server-side+Code+Execution#Server-sideCodeExecution-Storingfunctionsserverside http://www.mongodb.org/display/DOCS/Server-side+Code+Executi... http://www.mongodb.org/display/DOCS/Server-side+Code+Execution#Server-sideCodeExecution-NotesonConcurrency http://www.mongodb.org/display/DOCS/Server-side+Code+Executi...