Jun 18, 2015
WriteConcern in MongoDB
WriteConcern is mongodb allows developers to select how their application interacts with the database write operation and have impact on performance and data integrity.
Available modes are -
Unacknowledged
Acknowledged
Journalled
Fsynced
Replica Acknowledged
Weaker WriteConcern allows faster performance while reducing data integrity and vice versa.
This article on blog.mongodirector.com explains beautifully.