67 lines
1.3 KiB
Markdown
67 lines
1.3 KiB
Markdown
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# Distributed Tracing Specification
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## Overview
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Distributed tracing for request tracking across services.
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## Distributed Tracing Strategy
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**Solution**: OpenTelemetry or Jaeger
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**Implementation**:
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- Instrument services with tracing
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- Propagate trace context
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- Collect and store traces
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- Visualize in UI
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## Trace Sampling
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### Sampling Strategy
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**Head-Based Sampling**:
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- Sample rate: 1% of requests
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- Always sample errors
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- Always sample slow requests (> 1s)
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**Tail-Based Sampling** (optional):
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- Sample based on trace characteristics
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- More efficient storage
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## Trace Correlation Across Services
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### Trace Context Propagation
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**Headers**:
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- `traceparent` (W3C Trace Context)
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- `tracestate` (W3C Trace Context)
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**Propagation**: HTTP headers, message queue metadata
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### Trace Structure
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```
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Trace (request)
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├── Span (API Gateway)
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│ ├── Span (Explorer API)
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│ │ ├── Span (Database Query)
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│ │ └── Span (Cache Lookup)
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│ └── Span (Search Service)
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└── Span (Response)
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```
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## Performance Analysis Workflows
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### Analysis Steps
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1. Identify slow requests
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2. Trace request path
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3. Identify bottlenecks
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4. Optimize slow components
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5. Verify improvements
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## References
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- Logging: See `logging.md`
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- Metrics: See `metrics-monitoring.md`
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