Upgrading From Replica Pairs or Master/Slave: http://www.mongodb.org/display/DOCS/Upgrading+to+Replica+Sets http://www.mongodb.org/display/DOCS/Upgrading+to+Re

Upgrading From Replica Pairs or Master/Slave: http://www.mongodb.org/display/DOCS/Upgrading+to+Replica+Sets http://www.mongodb.org/display/DOCS/Upgrading+to+Replica+Set...