Correct answers: C & D
Logging: Logging tracks events and their timestamps. Logs and log types are also important.
Tracing: Tracing is the ability to track multiple events or a series of distributed events through a system.
https://opensource.com/article/18/9/distributed-tracing-microservices-world
C and D are correct:
Observability has three pillars (Logging, Metrics, and Tracing) or telemetry types that you, as application developer or designer, need to take into consideration:
Logging: Logging tracks events and their timestamps. Logs and log types are also important.
Metrics or time-series metrics: These metrics can simply be defined as system performance parameters (or application health measures) and are usually measured within a unit in time. As mentioned in “Latency and Rate Limiting in Application Design and Performance,” response time, sessions per second, transactions per second—all are examples of metrics.
Tracing: Tracing is the ability to track multiple events or a series of distributed events through a system.
answer in the url provided by B3nd2cida
"knowing the state of a single instance of a single service isn't enough; we need to be able to aggregate the metrics for all instances of a given service, perhaps grouped by version"
"knowing the state of a single instance of a single service isn't enough". Indeed... that is true. But not being enough doesn't mean it shouldn't be part of a solution. It just means the solution is multi-factor. Several things must be in place and none of them alone is enough.
To me this is yet another classical example of the long tradition Cisco has of making screwed-up questions that can't be answered 100% correctly. In this question, the right answer to me would be A, C and D.
"B" is not a part of "observable microservice"
gonna go with CD
upvoted 2 times
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