MongoDB 2.4.10 发布，NoSQL数据库

NoSQL数据库 MongoDB 2.4.10发布. 2014-04-05 之前版本是2014-01-01的2.4.9 Bugfix版本.其他产品线2.2.6 2.0.9 开发版2.6.0-RC3。

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：

2.4.10 - Changes

• Indexes: Fixed issue that can cause index corruption when building indexes concurrently (SERVER-12990)

• Indexes: Fixed issue that can cause index corruption when shutting down secondary node during index build (SERVER-12956)

• Indexes: Mongod now recognizes incompatible “future” text and geo index versions and exits gracefully (SERVER-12914)

• Indexes: Fixed issue that can cause secondaries to fail replication when building the same index multiple times concurrently (SERVER-12662)

• Indexes: Fixed issue that can cause index corruption on the tenth index in a collection if the index build fails (SERVER-12481)

• Indexes: Introduced versioning for text and geo indexes to ensure backwards compatibility (SERVER-12175)

• Indexes: Disallowed building indexes on the system.indexes collection, which can lead to initial sync failure on secondaries (SERVER-10231)

• Sharding: Avoid frequent immediate balancer retries when config servers are out of sync (SERVER-12908)

• Sharding: Add indexes to locks collection on config servers to avoid long queries in case of large numbers of collections (SERVER-12548)

• Sharding: Fixed issue that can corrupt the config metadata cache when sharding collections concurrently (SERVER-12515)

• Sharding: Don’t move chunks created on collections with a hashed shard key if the collection already contains data (SERVER-9259)

• Replication: Fixed issue where node appears to be down in a replica set during a compact operation (SERVER-12264)

• Replication: Fixed issue that could cause delays in elections when a node is not vetoing an election (SERVER-12170)

• Replication: Step down all primaries if multiple primaries are detected in replica set to ensure correct election result (SERVER-10793)

• Replication: Upon clock skew detection, secondaries will switch to sync directly from the primary to avoid sync cycles (SERVER-8375)

• Runtime: The SIGXCPU signal is now caught and mongod writes a log message and exits gracefully (SERVER-12034)

• Runtime: Fixed issue where mongod fails to start on Linux when /sys/dev/block directory is not readable (SERVER-9248)

• Windows: No longer zero-fill newly allocated files on systems other than Windows 7 or Windows Server 2008 R2 (SERVER-8480)

• GridFS: Chunk size is decreased to 255 KB (from 256 KB) to avoid overhead with usePowerOf2Sizes option (SERVER-13331)

• SNMP: Fixed MIB file validation under smilint (SERVER-12487)

• Shell: Fixed issue in V8 memory allocation that could cause long-running shell commands to crash (SERVER-11871)

• Shell: Fixed memory leak in the md5sumFile shell utility method (SERVER-11560)

下载：32位 https://fastdl.mongodb.org/linux/mongodb-linux-i686-2.4.10.tgz

 64位 https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.10.tgz

源码 https://fastdl.mongodb.org/src/mongodb-src-r2.4.10.tar.gz