digraph ws {
    node [shape = none]
    label = "Workload Synthesis Data Flow"
    edge [fontsize = 8]

    {
    rank = min;
    app [label = "application"];
    analyzer;
    nosqlbench;
    }

    subgraph clusterf {
    rank = same;
    label="";

    appops [label = "ops in\nflight"];
    oplog [label="full query\nlog"];
    workload [label="Synthesized\nWorkload"];
    test_ops[label="ops in\nflight"];
    }

    {
    rank = same;
    system[label="Capture\nTarget"];
    test_system[label="Test\nTarget"];
    }

    app -> appops[label="normal\noperation"];
    appops -> system;
    system -> oplog;

    analyzer [rank = min]
    oplog -> analyzer
    analyzer -> workload [label="pattern\nanalysis"];

    workload -> nosqlbench;
    nosqlbench -> test_ops  [label = "run\nscenario"];
    test_ops -> test_system;


}