Creating your first Graph (RDD API)

For the RDD API, the basic class in GraphX is called a Graph (org.apache.spark.graphx.Graph), which contains two types of RDDs as you might have guessed:

• Edges
• Vertices

In the following graph, you can see we have a number of different vertices, namely Fawad, Aznan, Ben, Tom, and Marathon.

Figure 7.6: Depiction of a graph

This is a labeled graph where the edges and vertices have labels associated with them.

Following the Graph, we will look at a code example, where we:

• Create the vertices
• Create the edges
• Instantiate a graph object
• View the vertices configured with the graph

The following code example can be used to create a Graph similar to the one shown in the preceding figure.

Code samples

Let's look at the code example:

import org.apache.spark.graphx._

val myVertices = sc.parallelize(Array(
  (1L, "Fawad"),
  (2L, "Aznan"),
  (3L, "Ben"),
  (4L, "Tom"),
  (5L, "Marathon"))
)

val myEdges =...