MongoDB Sharding

[Abhimanyu B]

Hi,

I have implemented sharding for two collections based on a column which is not indexed. Now after checking sh.status(), I can see all the data is saving in primary shard only. Data is not distributing among the other shard servers. What to do?

[William Hagan]

Hi,

Have you  enabled sharding at the database level and also called "sh.shardCollection"?

[Rhys Campbell]

Pretty sure you can only shard on index fields...

https://docs.mongodb.com/manual/core/sharding-introduction/ 

"To shard a collection, you need to select a shard key. A shard key is either an indexed field or an indexed compound field that exists in every document in the collection."

Check the output of sh.status()

https://docs.mongodb.com/manual/reference/method/sh.status/