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Availability defines the proportion of time that the system is functional and working.

Common causes:

  • System errors
  • Infrastructure issues
  • Malicious attacks
  • Frequent updates
  • Unexpected or access load
  • DOS (Denial of Service) attack
  • Inappropriate use of resources

Points to be considered:

  • Circuit Breaker Pattern
  • Health Check Endpoints and Monitoring
  • Queue-based Load Leveling
  • Throttling Pattern
  • Retry and Timeout Pattern
  • Bulkhead Pattern
  • Schedular Agent Supervisor Pattern
  • Compensating Transaction Pattern
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