The author doesn't mention if he had called getLastError after inserting data: http://www.mongodb.org/display/DOCS/getLastError+Command http://www.mongodb.org/

The author doesn't mention if he had called getLastError after inserting data: http://www.mongodb.org/display/DOCS/getLastError+Command http://www.mongodb.org/display/DOCS/getLastError+Command The MongoDB "way" is that clients know the importance of their data and can choose write strategies which make the proper trade-off between insertion throughput/latency and durability/consistency.