There are further details about how it works in this blog post: http://blog.labix.org/2012/08/22/multi-doc-transactions-for-mongodb http://blog.labix.org/2012/

There are further details about how it works in this blog post: http://blog.labix.org/2012/08/22/multi-doc-transactions-for-mongodb http://blog.labix.org/2012/08/22/multi-doc-transactions-for-... While it does work, it's still a workaround for the lack of first-class transactions in MongoDB. It offers a more limited API and requires care on the developer side. Despite being the author, I do hope it gets obsoleted by more convenient first-class transaction support in MongoDB itself at some point in the near future.