分布式文檔數據庫，MongoDB 3.1.9 發布

MongoDB 3.1.9 發布，此版本是個開發版本，不建議在生產環境使用。

新特性：

- Improved high-availability: config servers as replica sets and faster elections

• WiredTiger as the default storage engine
  
• Document validation rules
  
• Partial indexes
  </span>- Encryption at rest
  
• SpiderMonkey as the Javascript engine
  
• Multilingual case-sensitive full-text search and improved Unicode text search support
  
• Aggregation and query optimizer improvements, including a sampling operator and outer left joins
  
• Network stack improvements
  
• Tools improvements
  
  bug 修復：
  
  
• SERVER-533: Aggregation stage to randomly sample documents
  
• SERVER-1448: Host sharding config data on a replica set
  
• SERVER-10225: Replica set failover speed improvement
  
• SERVER-15176: New commands for find and getMore
  
• SERVER-17861: Change the default storage engine to WiredTiger
  
• SERVER-17991: Encrypted Storage Engine Enterprise - Single system key
  
• SERVER-18624: listCollections command should not be O(n^2) on MMAPv1
  
• SERVER-20159: Out of memory on index build during initial sync even with low cacheSize parameter
  
• SERVER-20339: Make NetworkInterfaceASIO the default factory
  
• TOOLS-916: Mongo export throws reflect.Value.Type errors
  
  </span>發行說明 | 下載 | 問題列表
  </p> 來自：http://www.oschina.net/news/66923/mongodb-3-1-9