motel / topology preview

topology-driven-logs.yaml

Defined topology and effective trace rate over 7s.

2services
2operations
1defined calls
1root operations
1scenarios

Trace rate

Traffic patterns and scenario traffic overrides. Shaded regions show scenario windows.

Service map

Arrows show defined calls between services. Dashed arrows appear only in scenario additions.

contains a root operationdefined callscenario addition

Captured run

One local simulation: up to 500ms, seed 1. Up to 10 traces, 1,000 spans, 500 metric data points, and 500 logs are stored in this file.

10traces generated
20spans generated
1span errors
460ms elapsed
0metric points
14logs

Traces

Trace e2d4e1523894282e5c14a0f4a25f9c18 · 2 captured spans

gateway / GET /api server

0 ms175.340057 ms

backend / process client

14.097469 ms147.145119 ms

Trace 53b0122222f21e519745834f866b221d · 2 captured spans

gateway / GET /api server

0 ms104.035492 ms

backend / process client

26.386926 ms51.261639 ms

Trace d81e9c908123e0225ce06bdf48389535 · 2 captured spans

gateway / GET /api server

0 ms117.190324 ms

backend / process client

19.112597 ms78.96513 ms

Trace 8b21348eb90e5fb72dc7239386b5d137 · 2 captured spans

gateway / GET /api server

0 ms83.021833 ms

backend / process client

14.955605 ms53.110622 ms

Trace d642461352bb10ae01fbdf347c042010 · 2 captured spans

gateway / GET /api server

0 ms84.103332 ms

backend / process client

17.718741 ms48.66585 ms

Trace e21d49dc1557cc34d9de9e8b9d0ef978 · 2 captured spans

gateway / GET /api server

0 ms124.851758 ms

backend / process client

20.329899 ms84.191959 ms

Trace aaf6856a7ef480c77e7c12c3799da758 · 2 captured spans

gateway / GET /api server

0 ms168.44407 ms

backend / process client

20.989497 ms126.465075 ms

Trace aea5af9f7b5f53127a2ced17b08da34e · 2 captured spans

gateway / GET /api server

0 ms48.432046 ms

backend / process client

24.216023 ms0 ms

Trace ed82be7443cb46c4a7367eb798133baa · 2 captured spans

gateway / GET /api server

0 ms162.93507 ms

backend / process client

24.826648 ms113.281774 ms

Trace ac8a008c98159e3f3bae6fc84320a170 · 2 captured spans

gateway / GET /api server

0 ms106.356522 ms

backend / process client

17.632747 ms71.091027 ms

Metrics

No metric data points emitted.

Logs

Service	Severity	Message	Trace
gateway	INFO	handled GET /api method=GET	e2d4e1523894282e5c14a0f4a25f9c18
gateway	INFO	handled GET /api method=GET	53b0122222f21e519745834f866b221d
gateway	DEBUG	cache lookup key=user:1	53b0122222f21e519745834f866b221d
gateway	INFO	handled GET /api method=GET	d81e9c908123e0225ce06bdf48389535
gateway	INFO	handled GET /api method=GET	8b21348eb90e5fb72dc7239386b5d137
gateway	INFO	handled GET /api method=GET	d642461352bb10ae01fbdf347c042010
gateway	ERROR	upstream timeout for GET /api	d642461352bb10ae01fbdf347c042010
gateway	INFO	handled GET /api method=GET	e21d49dc1557cc34d9de9e8b9d0ef978
gateway	DEBUG	cache lookup key=user:2	e21d49dc1557cc34d9de9e8b9d0ef978
gateway	INFO	handled GET /api method=GET	aaf6856a7ef480c77e7c12c3799da758
gateway	INFO	handled GET /api method=GET	aea5af9f7b5f53127a2ced17b08da34e
gateway	DEBUG	cache lookup key=user:3	aea5af9f7b5f53127a2ced17b08da34e
gateway	INFO	handled GET /api method=GET	ed82be7443cb46c4a7367eb798133baa
gateway	INFO	handled GET /api method=GET	ac8a008c98159e3f3bae6fc84320a170

Raw captured output (JSON)

{
  "duration": "500ms",
  "slow_threshold": "1s",
  "seed": 1,
  "max_traces": 10,
  "stats": {
    "traces": 10,
    "spans": 20,
    "errors": 1,
    "failed_traces": 1,
    "timeouts": 0,
    "retries": 0,
    "spans_bounded": 0,
    "queue_rejections": 0,
    "circuit_breaker_trips": 0,
    "elapsed_ms": 460,
    "traces_per_second": 21.737567078409445,
    "spans_per_second": 43.47513415681889,
    "error_rate": 0.05,
    "trace_error_rate": 0.1
  },
  "spans": [
    {
      "trace_id": "e2d4e1523894282e5c14a0f4a25f9c18",
      "span_id": "1a559d47b18ea695",
      "service": "gateway",
      "name": "GET /api",
      "kind": "server",
      "start_time": "2026-09-27T21:36:04.873234+01:00",
      "end_time": "2026-09-27T21:36:05.048574057+01:00",
      "start_ms": 1790541364873.234,
      "duration_ms": 175.340057,
      "status": "Unset",
      "resource": {
        "service.name": {
          "type": "STRING",
          "value": "gateway"
        }
      },
      "attributes": {
        "http.request.method": {
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          "value": "GET"
        },
        "synth.operation": {
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          "value": "GET /api"
        },
        "synth.scenarios": {
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          "value": []
        },
        "synth.service": {
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        }
      }
    },
    {
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  "metrics": [],
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}

Operations and calls

Call details are from the baseline topology. Probabilities below 100%, repeated calls, and async calls are labelled.

backend

backend.process

No downstream calls

gateway

gateway.GET /api root

backend.process

Scenarios

db-degradation

3s–7s

backend.process changes logs
backend.process error rate: 15%
gateway changes logs