Upgrade notes are here: http://docs.mongodb.org/master/release-notes/2.6-upgrade/ http://docs.mongodb.org/master/release-notes/2.6-upgrade/ "the upgrade from M

Upgrade notes are here: http://docs.mongodb.org/master/release-notes/2.6-upgrade/ http://docs.mongodb.org/master/release-notes/2.6-upgrade/ "the upgrade from MongoDB 2.4 to 2.6 is a binary-compatible drop-in upgrade: shut down the mongod instances and replace them with mongod instances running 2.6."