Use Hive to directly and efficiently query data stored in Accumulo tables. See the Getting Started Guide and required AUX_JARS list. The homepage also lists the current limitations.
I've submitted a patch ACCUMULO-143 to get this directly into Accumulo trunk, but for now people can experiment with it at: https://github.com/bfemiano/accumulo-hive-storage-manager. The CREATE EXTERNAL TABLE keywords allows Hive to create a metastore entry for the Accumulo table, which 'theoretically' suggests you could use Cloudera Impala directly with Accumulo. I have not tested this though.
