MongoDB 2.4.4发布. 2013-06-04 之前版本是2013-04-24发布的2.4.3。修正大量bug以及几个增强。 其他产品线2.2.4 2.0.9 开发版2.5.0。
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-6947] - db.createCollection creates undefined fields which cause mongorestore to fail
[SERVER-7424] - Shell trims multiple whitespace characters in strings when displaying (data not affected)
[SERVER-7588] - mongo shell ISODate return bug
[SERVER-7892] - JS (v8) doesn't indent
[SERVER-8741] - mrShardedOutput.js failing on multiple platforms - ensure transferMods after commit
[SERVER-9242] - serverStatus workingSet and indexCounters not working on Windows
[SERVER-9260] - Race in hash_presplit.js
[SERVER-9315] - local.slaves is not correctly maintained in authenticated system.
[SERVER-9333] - WriteConcern with tags>2 say the write timedout, when it didn't
[SERVER-9339] - rollback files missing after rollback
[SERVER-9401] - GeoJSON Parser: Can't extract geo keys from object, malformed geometry?
[SERVER-9417] - opReplicatedEnough should assert on step down
[SERVER-9448] - Read-only receivers in MapReduce code cause modifications to be silently ignored
[SERVER-9484] - 2dsphere Index may not return all documents for $near and geoNear
[SERVER-9491] - Upper chunk key not written properly to the log in some places
[SERVER-9502] - Using regex in _id breaks replication
[SERVER-9528] - Retry network errors during initial sync document copies
[SERVER-9538] - mongodb 2.4.3 crash : BufBuilder attempted to grow() to 134217728 bytes, past the 64MB limit
[SERVER-9542] - Incorrectly coded chunk/shard version comparison
[SERVER-9578] - mongos dies on SIGUSR1 instead of rotating logs
[SERVER-9618] - server8070.js failing intermittently across OS X builders
[SERVER-9621] - closeall.js failing on new windows 32-bit builder
[SERVER-9638] - no_empty_reset.js failing
[SERVER-9647] - Query using compound 2dsphere index with additional descending field can block indefinitely
[SERVER-9649] - No public role grants writebacksQueued
[SERVER-9658] - Reduce frequency of debug message "we think data is in ram"
[SERVER-9661] - config upgrade fails if collection missing "key" field
[SERVER-9683] - replsetprio1.js failing
[SERVER-9694] - stepdown3.js failing on SSL special builder
[SERVER-9695] - Couldn't kill $where op in features3.js on RHEL 32
[SERVER-9702] - drop2.js failing under sharding_passthrough
[SERVER-9718] - authCommands.js waits too short a time for migrations
[SERVER-9719] - sharding_multiple_ns_rs.js use wait logic instead of sleep to make sure new primary is online
[SERVER-9720] - return_partial_shards_down.js turn off balancer before manual chunk moves
[SERVER-9721] - Performance regression in Windows build
[SERVER-9730] - Asymmetrical network partition can cause the election of two PRIMARY nodes
Improvement
[SERVER-4739] - Race condition in log rotation (was: SIGUSR1 should set a flag rather than doing rotation)
[SERVER-9636] - Display chunk version, not memory address, in non-default log line
Task
[SERVER-8813] - Migrate to Cyrus SASL2 library for sasl authentication.
Sub-task
[SERVER-8066] - mongorestore should ignore undefined options
下载：32位 http://fastdl.mongodb.org/linux/mongodb-linux-i686-2.4.4.tgz
64位 http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.4.tgz
源码 http://downloads.mongodb.org/src/mongodb-src-r2.4.4.tar.gz
来自:开源中国社区
