MongoDB 1.8.0 Release Candidate is out

MongoDB 1.8.0-rc0 is now available, you can download from here and find the release notes here.

The main changes over the current 1.6 production release relate to:

• durability, a much talked about topic (!), with support now for write-ahead journaling (docs)
• sparse and covered indexes (on my radar to try out)
  
• support for more Map/Reduce functionality (note there are some breaking changes in this area)

The full info on the changes is in the Release Notes document.