title: Convert csv data to graph data
body: <p>I am experimenting Apache Giraph.I need to create a simple graph for my csv file residing in HDFS,which shows a relationship between 2 columns.(victim related to store name)
  My data size is of above 1Gb csv format.Initially tried to use neo4j using java with local file.But it is only capable of loading small data and cannot import data directly from HDFS. My data may increase.So thought of using Apache Giraph. </p>
  
  <p>But how to achieve the same? </p>
  
  <p>Hope apache giraph only takes input in vertext format .My data is in csv format.so Is there any tool to make my csv to graph format and supply it as input to Giraph for computations in graph.</p>