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:
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.