MongoDB 2.4 RC2 (2.3 开发系列) 发行说明

请注意，该版本还是在测试阶段，请勿在生产环境中使用。

下载地址：http://www.mongodb.org/downloads - Development Release (Unstable)

这里有一份关于 Upgrade MongoDB 2.2 to 2.4 指南。

MongoDB 2.4 的改变包括：

• Text Indexes
• New Modular Authentication System with Support for Kerberos
• Role Based Access Control and New Privilege Documents
• Default JavaScript Engine Switched to V8 from SpiderMonkey
• Added Limitations for Map-Reduce and $where Operations
• New Geospatial Indexes with GeoJSON and Improved Spherical Geometry
• New Hashed Index and Sharding with a Hashed Shard Key
• db.killOp() Can Now Kill Foreground Index Builds
• $setOnInsert – New Update Operator
• --setParameter Option Available on the mongos and mongod Command Line