Well - in many cases they leave the decisions in the hands of developers because they have made a conscious choice to let the developers decide. BigTable is mo

Well - in many cases they leave the decisions in the hands of developers because they have made a conscious choice to let the developers decide. BigTable is more than anything a filesystem - it is NOT a database. It lacks true user configurable indexes, custom sorting, querying etc. These features and the data storage requirements to support them are a very different prospect from what a filesystem (even a distributed one) needs.