Is it possible to mongodump the last “x” records from a collection?

Question

Can you use mongodump to dump the latest \"x\" documents from a collection? For example, in the mongo shell you can execute:

db.stats.find().sort({$natural:-1}).         


        

Answer 1

mongodump supports the --query operator. If you can specify your query as a json query, you should be able to do just that.

If not, then your trick of running a query to dump the records into a temporary collection and then dumping that will work just fine. In this case, you could automate the dump using a shell script that calls a mongo with a javascript command to do what you want and then calling mongodump.