Write concern and its significance
Write concern is the minimum guarantee that the MongoDB server provides with respect to the write operation done by the client. There are various levels of write concern that are set by the client application, to get a guarantee from the server that a certain stage will be reached in the write process on the server side.
The stronger the requirement for a guarantee, the greater the time taken (potentially) to get a response from the server. With write concern, we don't always need to get an acknowledgement from the server about the write operation being completely successful. For some less crucial data such as logs, we might be more interested in sending more writes per second over a connection. On the other hand, when we are looking to update sensitive information, such as customer details, we want to be sure of the write being successful (consistent and durable); data integrity is crucial and takes precedence over the speed of the writes.
An extremely...
