public static HadoopIoStrategy instance() {
        return INSTANCE;
    }
The default implementation of the {@link IoStep} is a single threaded operation and doesn't properly take into
account the method by which OLAP read/writes take place with Hadoop. This strategy removes that step and replaces
it with the {@link HadoopIoStep} which is a {@link VertexProgramStep} that uses the {@link CloneVertexProgram} to
execute the IO operation in an OLAP fashion.

@author Stephen Mallette (http://stephen.genoprime.com)
hadoop-gremlin/src/main/java/org/apache/tinkerpop/gremlin/hadoop/process/computer/traversal/strategy/HadoopIoStrategy.java