This is a small tool to populate your mongo db database with test data. I've created it because I needed some rough estimations/ideas of how my app will behave with large set of data. Basically, this tool uses already existing data as a source and either copies the first document/record N times or even the whole collection data n times. This is configured by copy_type parameter (=copy_one, copy_all). Other parameters include host, port (can be omitted for defaults), database, collection (where copy source is read and multiples, hence the name - Mongoplier). *** Sample usage (default hostname and post used): mongoplier.py --source collection --database testdb --collection test_collection --copy_type copy_one --nrepeats 1 Description: finds 1st document in a collection and fills it into collection "nrepeats" times. Advanced usage (+hostname specified, +copy of all documents N times, instead of just first one) mongoplier.py --host localhost --port 27017 --source collection --database testdb --collection test_collection --copytype copy_one --nrepeats 1 Description: takes the whole collection data and fills it into collection "nrepeats" times