Which SLIs/SLOs are relevant for Audit logging?

When it comes to audit logging, there are several important Service Level Indicators (SLIs) and Service Level Objectives (SLOs) that can help ensure the effectiveness and reliability of your logging system. Here are some relevant SLIs/SLOs for audit logging:

• Availability: Measure the percentage of time the logging system is operational and accessible.
  SLO: 99.9% availability per month.
• Latency: Monitor the time taken to log an event from the time it occurs.
  SLO: 95% of logs recorded within 100 milliseconds.
• Completeness: Assess whether all expected events are logged without any loss.
  SLO: 100% of critical events must be logged.
• Retention: Ensure that logs are retained for the required duration as per compliance needs.
  SLO: 100% of logs retained for at least 1 year.
• Integrity: Verify that logs have not been tampered with and accurately reflect activities.
  SLO: 100% integrity checks passed on logged data.

These metrics not only help in maintaining robust logging practices but also ensure that organizations can effectively audit and monitor activities as required.