• Sharding stability improvements. 

## 1.7.2 

• $rename operator allows renaming of fields in a document. 

• db.eval() not to block. 

• Geo queries with sharding. 

• mongostat --discover option 

• Chunk splitting enhancements. 

• Replica sets network enhancements for servers behind a nat. 

## 1.7.1 

• Many sharding performance enhancements. 

• Better support for $elemMatch on primitives in embedded arrays. 

• Query optimizer enhancements on range queries. 

• Window service enhancements. 

• Replica set setup improvements. 

• $pull works on primitives in arrays. 

## 1.7.0 

• Sharding performance improvements for heavy insert loads. 

• Slave delay support for replica sets. 

• getLastErrorDefaults for replica sets. 

• Auto completion in the shell. 

• Spherical distance for geo search. 

• All fixes from 1.6.1 and 1.6.2. 

## Release Announcement Forum Pages 

• 1.8.1$^{896}$, 1.8.0 897 

• 1.7.6$^{898}$, 1.7.5$^{899}$, 1.7.4$^{900}$, 1.7.3$^{901}$, 1.7.2$^{902}$, 1.7.1$^{903}$, 1.7.0 904 

