虽然mongodb release notes页面显示的版本还是3.0.4-rc0，不过3.0.4正式版已经可以在mongodb的仓库中下载到了，详细的change log页面也可以看到版本号显示3.0.4。
此版本的更新大多是BUG修复和内部性能提升，对用户使用上并没什么影响。
Minor Releases3.0.4-rc0 – June 10, 2015Fix missed writes with concurrent inserts during chunk migration from shards with WiredTiger primaries: SERVER-18822 Resolve write conflicts with multi-update updates with upsert=true with the Wired Tiger Storage engine: SERVER-18213 Fix case where secondary reads could block replication: SERVER-18190 Improve performance on Windows with WiredTiger and documents larger than 16kb: SERVER-18079 Fix issue where WiredTiger data files are not correctly recovered following unexpected system restarts: SERVER-18316 All issues closed in 3.0.4
更详细的更新内容参考 mongodb change log页面： http://docs.mongodb.org/manual/release-notes/3.0-changelog/。 | 
