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Jaeger is an open-source tool that helps developers monitor the performance and availability of their microservices. It provides insights into traffic and interactions between services to identify bottlenecks and optimization opportunities.
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Usable application software: supports people in a task.
Concrete cog in the system that works inside larger relationships.
Jaeger is an open-source distributed-tracing system that captures and analyzes the path of individual requests through distributed services.
Uber developed Jaeger from 2015 for microservice observability, released it as open source, and later contributed it to the Cloud Native Computing Foundation.
Instrumented services create spans with trace ID, timing, attributes, and relationships. Collectors receive and store them; the query service and UI reconstruct the trace. Sampling limits data volume, while OpenTelemetry standardizes collection.
Time-bounded operations form the smallest units of a distributed flow.
Propagated IDs connect operations across process and service boundaries.
Timelines and dependencies expose latency, errors, and critical paths.
Jaeger supports root-cause analysis and performance understanding in distributed systems. Its value depends on complete context propagation, meaningful instrumentation, sampling strategy, privacy, and controlled cardinality.
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