doc/data_flow_simple.dot

digraph DruidDataFlow {
        graph [bgcolor="#fffef5", clusterrank=global, rankdir=TB];
        node [color="#0a0701", fillcolor="#fdf4c6", fontname=Helvetica, shape=box, style=filled, label="\N"];
        edge [color="#377d18"];

  1 [label = "REST query"];
 10 [label = "Broker.query_cache"];
  2 [label = "realtime_data_src"];
  3 [label = "Compute.disk_cache"];
  4 [label = "indexed segments\nblob_store (S3, HDFS)"];
  5 [label = "Realtime.working_set"];
  6 [label = "Compute.working_set"];

2 -> 5 [label = "Realtime.Firehose"];
5 -> 4 [label = "Realtime.segmentPusher"];

4 -> 3 [label = "Compute.load"];
3 -> 6 [label = "Compute.map"];

5 -> 10  [label = " results "];
6 -> 10  [label = " results "];
10 -> 1 [label = " results "];

10 -> 5  [label = " query "];
10 -> 6  [label = " query "];
1 -> 10 [label = " query "];
}