How to view sharding keys in mongodb shell?
This might be a dummy question, but I cannot find any clue in all online doc.
For a already-built-up mongodb cluster, How can I find which sharding key(s) is used for given collecton?
Answer
As outlined in the Sharding Administration Docs, you can use db.printShardingStatus() to see this information.
For sharded collections it will print the key pattern.