NoSQL MongoDB 2.4.2发布. 2013-04-18 之前版本是2013-03-23发布的2.4.1。Add pool stats for ShardedConnection以及Bug修正 其他产品线2.2.4 2.0.9。

MongoDB是一个介于关系数据库和非关系数据库之间的产品， 是非关系数据库当中功能最丰富，最像关系数据库的。他支持的数据结构非常松散，是类似json的bjson格式，因此可以存储比较复杂的数据类型。 Mongo最大的特点是他支持的查询语言非常强大，其语法有点类似于面向对象的查询语言，几乎可以实现类似关系数据库单表查询的绝大部分功能，而且还支持 对数据建立索引。

它的特点是高性能、易部署、易使用，存储数据非常方便。主要功能特性有：

• 面向集合存储，易存储对象类型的数据。
• 模式自由。
• 支持动态查询。
• 支持完全索引，包含内部对象。
• 支持查询。
• 支持复制和故障恢复。
• 使用高效的二进制数据存储，包括大型对象（如视频等）。
• 自动处理碎片，以支持云计算层次的扩展性
• 支持RUBY，PYTHON，JAVA，C++，PHP等多种语言。
• 文件存储格式为BSON（一种JSON的扩展）
• 可通过网络访问

完全改进：

Bug

• [SERVER-8720] - Memory leak in DBClientReplicaSet::slaveConn
• [SERVER-8799] - Sort or Find on Symbol data type throws exception
• [SERVER-8984] - DBClientInterface::getLastError should test for command failures
• [SERVER-8999] - Searches on partitioned text indexes return no results if "language" is specified
• [SERVER-9014] - Mongod and mongos crash induced by many concurrent invocations of the getnonce command.
• [SERVER-9027] - Using DBRef as shard key not working anymore in 2.2.0+
• [SERVER-9029] - Duplicate users in system.users causes problem with 2.4.x upgrade
• [SERVER-9047] - warning: failed to read from /proc/self/numa_maps: errno:2 No such file or directory
• [SERVER-9050] - configsvr + getLastError w:1 should not return norepl error, just note
• [SERVER-9053] - TTL index asserts on 2.4 secondary
• [SERVER-9054] - Update db.help() with new format for addUser()
• [SERVER-9061] - Mongostat 2.4 segfaults when called with multiple hosts and auth
• [SERVER-9062] - mongod crashes when creating a "2dsphere" index on a large (~10 million docs) collection.
• [SERVER-9066] - Field names can be repeated in JavaScript when the same value is set multiple times
• [SERVER-9082] - JSON parser doesn't accept simple DBRef $id values, like ints or strings
• [SERVER-9085] - db.replSetInfo() issue with converting OpTimes to seconds
• [SERVER-9088] - printjson/printjsononeline JS helpers may attempt to access the 'DB' object (even if it doesn't exist)
• [SERVER-9124] - Avoid raw pointers for SM's nativeHelper
• [SERVER-9125] - Unable to upgrade config metadata from v3 to v4 - 13127 getMore: cursor didn't exist on server, possible restart or timeout?
• [SERVER-9139] - cursor leak in mongos of unsharded cursors
• [SERVER-9182] - mongorestore won't restore manually edited .metadata.json file if user editor adds trailing newline
• [SERVER-9213] - Resource constraints cause premature OOM and segfault
• [SERVER-9228] - s2cursor can return dups when it yields
• [SERVER-9229] - Windows 32bit failing intermittently on migrateBig.js
• [SERVER-9230] - v8 ObjectTracker isn't tracking uncollected objects
• [SERVER-9251] - "Extra" fields added to lazy BSON V8 objects not order preserving
• [SERVER-9267] - Issues with readonly BSON in v8
• [SERVER-9311] - replsetprio1.js failing consistently on Solaris in v2.4 branch

Improvement

• [SERVER-7271] - On transient config server failure, mongod should not abort
• [SERVER-8819] - Add round trip unit jstest framework for 10gen custom types in javascript interpreter
• [SERVER-8983] - Add error code for authentication fails - especially important for auditing products
• [SERVER-9003] - Display replica set chaining topology in rs.status()
• [SERVER-9022] - Enable mongos mode which releases ShardConnections to the pool after read ops
• [SERVER-9174] - Race condition on read_pref_rs_client.js after reconfig.
• [SERVER-9185] - Add GC Prologue and Epilogue heap stats
• [SERVER-9312] - sharding_migrateBigObject.js longer timeout for slow machines

New Feature

• [SERVER-6991] - Add pool stats for ShardedConnection

Question

• [SERVER-9111] - $CLUSTER & $SERVER databases

下载：32位 http://fastdl.mongodb.org/linux/mongodb-linux-i686-2.4.2.tgz

64位 http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.2.tgz

源码 http://downloads.mongodb.org/src/mongodb-src-r2.4.2.tar.gz