General Concepts

Question 1

3 Pillars of observability

Answer 1

1. Logs
2. Metrics
3. Traces

Question 2

Logs

Answer 2

Provide chronological record of events or transactions within the system

Question 3

Metrics

Answer 3

Quantifiable measurements that offer a snapshot of a system’s performance over time

Question 4

Traces

Answer 4

Help track the flow of requests through various services and components of the system

Question 5

Monitoring tools should provide

Answer 5

1. collect or at least listen for events, typically with a timespan
2. effectively store these events
3. support query
4. provide graphical monitoring

Question 6

Span

Answer 6

1. a single operation within a trace.
2. Spans can be nested to form a trace tree.

Question 7

Service-Level Objective (SLO)

Answer 7

Internal goals that the provider wants to reach to meet those SLAs. These are specific objectives about things like response time, system availability, and solution performance

Question 8

Service level agreements (SLA)

Answer 8

The minimum levels of performance, availability, and other metrics that customers are guaranteed when using the provider’s solution

Question 9

Service level indicator (SLI)

Answer 9

Actual metrics that the provider uses to measure how close it is to meeting both SLOs and SLAs