MongoDB 3.1.9 is released

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October 09, 2015
Category: Release Notes

MongoDB 3.1.9 has been released. As a reminder, 3.1.9 is a development release and is not intended for production use. The 3.1 series will evolve into 3.2, which will be for production.

MongoDB 3.1.9 completes the new features that will be available in MongoDB 3.2:
- Improved high-availability: config servers as replica sets and faster elections
- WiredTiger as the default storage engine
- Document validation rules
- Partial indexes
- 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

New/fixed in this release:

- 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

Release notes | Downloads | All Issues

As always, please let us know of any issues.

– The MongoDB Team

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