How to read or write a graph using low-level input/output.


io( file_name ).[read() | write()] 


Graph data is written to a file or read from a file using io. The file to read must be located on a cluster node, and the written file will be created on the cluster node on which the command is run.


Write the graph data to a file using the GraphSON format:"/tmp/food_qs.json").write()
Read the graph data from a file using the GraphSON format:"/tmp/food_qs.json").read()