The Apache Accumulo� sorted, distributed key/value store is a robust, scalable, high performance data storage and retrieval system. Apache Accumulo is based on Google's BigTable design and is built on top of Apache Hadoop, Zookeeper, and Thrift. Apache Accumulo features a few novel improvements on the BigTable design in the form of cell-based access control and a server-side programming mechanism that can modify key/value pairs at various points in the data management process. - Apache.org
Following mailing lists have been archived for Accumulo:
accumulo-useraccumulo-dev
accumulo-commits
accumulo-notifications