Simba Technologies
Simba Technologies

Simba MongoDB ODBC Driver with SQL Connector 2.2.3
Installation and Configuration Guide

Write Concern

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.


  • If you set this option to a value that is greater than 1, make sure to also specify an appropriate value for the Timeout setting or the WriteConcernTimeout key. 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.
  • The process for acknowledging a write operation typically takes four times longer than an INSERT or UPDATE operation, but it is necessary if fault tolerance is important.