3 ms·The Aggregation Framework is a great feature, already in production...by eranation 14y agoThe Aggregation Framework is a great feature, already in production...mikeycgto 14y agoBeen very excited about this feature since I first heard about it!encoderer 14y agoThis does look cool. Aggregation previously was a joke with its collection size limitation. I haven't used Mongo in a year. Are Map Reduce jobs still single threaded?_jmar777 14y agoYes.