Determines the level of acknowledgment requested for write operations in MongoDB, applicable to standalone mongod, replica sets, or sharded clusters.

Data Type

string

Default Value

"0"

Remarks

The WriteConcern property in MongoDB defines the acknowledgment level required for write operations, determining how confident MongoDB must be about the success of a write before confirming it. The default value is { w: 1 }, meaning the primary node must acknowledge the write operation before returning success to the client.

This property is useful for balancing data safety and performance.