Available returns a ReadConcern that requests data from an instance with no guarantee that the data has been written to a majority of the replica set members (i.e.

Level creates an option that sets the level of a ReadConcern.

Linearizable returns a ReadConcern that requests data that reflects all successful majority-acknowledged writes that completed prior to the start of the read operation.

Local returns a ReadConcern that requests data from the instance with no guarantee that the data has been written to a majority of the replica set members (i.e.

Majority returns a ReadConcern that requests data that has been acknowledged by a majority of the replica set members (i.e.

New constructs a new read concern from the given string.

Snapshot returns a ReadConcern that requests majority-committed data as it appears across shards from a specific single point in time in the recent past.

A ReadConcern defines a MongoDB read concern, which allows you to control the consistency and isolation properties of the data read from replica sets and replica set shards.

Option is an option to provide when creating a ReadConcern.