MongoDB Documentation, Release 3.0.4 Downgrade Procedure Once upgraded to MongoDB 2.6, you cannot downgrade to any version earlier than Mon- goDB 2.4. If you have text or 2dsphere indexes, you can only downgrade to MongoDB 2.4.10 or later. Except as described on this page, moving between 2.4 and 2.6 is a drop-in replacement: Step 1: Stop the existing mongod instance. For example, on Linux, run 2.6 mongod with the --shutdown option as follows: Replace /var/mongod/data with your MongoDB dbPath . See also the Stop mongod Processes (page 225) for alternate methods of stopping a mongod instance. Step 2: Start the new mongod instance. Ensure you start the 2.4 mongod with the same dbPath : Replace /var/mongod/data with your MongoDB dbPath . See Upgrade MongoDB to 2.6 (page 866) for full upgrade instructions. Download Other Resources 12.2.2 Release Notes for MongoDB 2.4 To download MongoDB 2.6, go to the downloads page$^{676}$. • All JIRA issues resolved in 2.6$^{677}$. • All Third Party License Notices$^{678}$. March 19, 2013 MongoDB 2.4 includes enhanced geospatial support, switch to V8 JavaScript engine, security enhancements, and text search (beta) and hashed index. Minor Releases 2.4 Changelog 2.4.14 • Packaging: Init script sets process ulimit to different value compared to documentation (SERVER-17780$^{679}$) • Security: Compute BinData length in v8 (SERVER-17647$^{680}$) $^{676}$http://www.mongodb.org/downloads $^{678}$https://github.com/mongodb/mongo/blob/v2.6/distsrc/THIRD-PARTY-NOTICES $^{679}$https://jira.mongodb.org/browse/SERVER-17780 $^{680}$https://jira.mongodb.org/browse/SERVER-17647 12.2. Previous Stable Releases 877 rc1%22%2C+%222.6.0-rc2%22%2C+%222.6.0-rc3%22%29 mongod --dbpath /var/mongod/data --shutdown mongod --dbpath /var/mongod/data