Specifies a level of isolation for read operations. For example, you can use read concern to only read data that has propagated to a majority of nodes in a replica set.
The level of the read concern.
https://docs.mongodb.com/manual/reference/read-concern/
See Implementation
Specifies a level of isolation for read operations. For example, you can use read concern to only read data that has propagated to a majority of nodes in a replica set.