mongodb how to mongodump only indexes to another m

Question

I have a mongodb instance with a lot of data, now I need to start up a new instance with the same structure without data.

how to get it done?

Answer 1

You can do that with the "query" option, with a query that does not return any document. Something like:

mongodump -q '{ "foo" : "bar"  }'

This will dump all the dbs and indexes, you can then do a mongorestore to recreate them into another mongod instance

See documentation: http://docs.mongodb.org/manual/reference/program/mongodump/#cmdoption--query