This is a simple aggregation example. To build this example run maven and then copy the produced jar into the accumulo lib dir. This is already done in the tar distribution.
$ bin/accumulo shell -u username Enter current password for 'username'@'instance': *** Shell - Apache Accumulo Interactive Shell - - version: 1.3.x-incubating - instance name: instance - instance id: 00000000-0000-0000-0000-000000000000 - - type 'help' for a list of available commands - username@instance> createtable aggtest1 -a app=org.apache.accumulo.examples.aggregation.SortedSetAggregator username@instance aggtest1> insert foo app 1 a username@instance aggtest1> insert foo app 1 b username@instance aggtest1> scan foo app:1 [] a,b username@instance aggtest1> insert foo app 1 z,1,foo,w username@instance aggtest1> scan foo app:1 [] 1,a,b,foo,w,z username@instance aggtest1> insert foo app 2 cat,dog,muskrat username@instance aggtest1> insert foo app 2 mouse,bird username@instance aggtest1> scan foo app:1 [] 1,a,b,foo,w,z foo app:2 [] bird,cat,dog,mouse,muskrat username@instance aggtest1>
In this example a table is created and the example set aggregator is applied to the column family app.