This is an implementation of the TinkerPop Blueprints API using Apache Accumulo as the backend. This implementation provides easy to use, easy to write, and easy to read access to an arbitrarily large graph that is stored in Accumulo.

We implement the following Blueprints interfaces:
1. Graph
2. KeyIndexableGraph
3. IndexableGraph

##Code Examples ###Creating a new distributed graph

Configuration cfg = new AccumuloGraphConfiguration()
	.setInstanceName("accumulo").setUser("user").setZookeeperHosts("zk1")
    .setPassword("password".getBytes()).setGraphName("myGraph");
Graph graph = GraphFactory.open(cfg.getConfiguration());

###Creating a new Mock Graph

Setting the instance type to mock allows for in-memory processing with a MockAccumulo instance.
There is also support for Mini Accumulo.

Configuration cfg = new AccumuloGraphConfiguration().setInstanceType(InstanceType.Mock)
	.setGraphName("myGraph");
Graph graph = GraphFactory.open(cfg);

###Accessing a graph

Vertex v1 = graph.addVertex("1");
v1.setProperty("name", "Alice");
Vertex v2 = graph.addVertex("2");
v2.setProperty("name", "Bob");

Edge e1 = graph.addEdge("E1", v1, v2, "knows");
e1.setProperty("since", new Date());

###Creating indexes

((KeyIndexableGraph)graph)
	.createKeyIndex("name", Vertex.class);

###MapReduce Integration

####In the tool

AccumuloConfiguration cfg = new AccumuloGraphConfiguration()
	.setInstanceName("accumulo").setZookeeperHosts("zk1").setUser("root")
	.setPassword("secret".getBytes()).setGraphName("myGraph");

Job j = new Job();
j.setInputFormatClass(VertexInputFormat.class);
VertexInputFormat.setAccumuloGraphConfiguration(j,
	cfg.getConfiguration());

####In the mapper

public void map(Text k, Vertex v, Context c) {
    System.out.println(v.getId().toString());
}

##Table Design ###Vertex Table

Row ID	Column Family	Column Qualifier	Value
VertexID	Label Flag	Exists Flag	[empty]
VertexID	INVERTEX	OutVertexID_EdgeID	Edge Label
VertexID	OUTVERTEX	InVertexID_EdgeID	Edge Label
VertexID	Property Key	[empty]	Serialized Value
###Edge Table
Row ID	Column Family	Column Qualifier	Value
---	---	---	---
EdgeID	Label Flag	InVertexID_OutVertexID	Edge Label
EdgeID	Property Key	[empty]	Serialized Value
###Edge/Vertex Index
Row ID	Column Family	Column Qualifier	Value
---	---	---	---
Serialized Value	Property Key	VertexID/EdgeID	[empty]

###Metadata Table

Row ID	Column Family	Column Qualifier	Value
Index Name	Index Class	[empty]	[empty]
##Advanced Configuration
###Basic Accumulo Control
TODO
###Advanced Accumulo Control
TODO
###Caching
TODO
###Preloading
TODO