{
  "type": "object",
  "required": ["duration_s", "failures"],
  "properties": {
    "duration_s": { "type": "number", "description": "The time it took to collect topology data" },
    "failures": { "type": "array", "description": "The information about failed queries" },
    "application_requests_per_hour": { "type": "number", "description": "The number of requests to the web application per hour" },
    "nodes": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "node_cpus":               { "type": "number", "description": "The number of CPU cores of this node" },
          "node_cpu_utilization":    { "type": "number", "description": "The CPU utilization ratio of this node" },
          "node_memory_total_bytes": { "type": "number", "description": "The total available memory of this node" },
          "node_memory_utilization": { "type": "number", "description": "The memory utilization ratio of this node" },
          "node_services": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "name":               { "type": "string", "description": "The name of the GitLab service running on this node" },
                "server":             { "type": "string", "description": "The type of web server used (Puma only from 14.0)" },
                "process_count":      { "type": "number", "description": "The number of processes running for this service" },
                "process_memory_rss": { "type": "number", "description": "The average Resident Set Size of a service process" },
                "process_memory_uss": { "type": "number", "description": "The average Unique Set Size of a service process" },
                "process_memory_pss": { "type": "number", "description": "The average Proportional Set Size of a service proces" }
              }
            }
          },
          "node_uname_info": {
            "type": "object",
            "properties": {
              "machine": { "type": "string", "description": "The machine hardware name of this node" },
              "release": { "type": "string", "description": "The operating system release of this node" },
              "sysname": { "type": "string", "description": "The operating system name of this node" }
            }
          }
        }
      }
    }
  }
}