|Key Name||Default Value||Required|
The total number of primary and secondary servers that must acknowledge a write operation in order for the driver to report a successful write operation.
When this option is set to
0, the driver does not require write operations to be acknowledged.
WriteConcernTimeoutkey. Setting this option to a value greater than 1 without specifying a timeout interval may cause the driver to wait indefinitely for replica set members to come online.