Availability

Kind: quality-attribute

Layer: Correctness Core

Record: lexicon:availability

Canonical: Lexicon

The proportion of time a system is operational and able to serve requests.

Listed in Lexicon terms, after Ungoverned Global Registry and before Security.

Category

• Quality Attributes

In tension with

• Control Plane
• Leader Election
• Consensus
• Fail Safe
• Fail Secure
• Single Source of Truth
• Consistency
• Control Plane / Availability
• Leader Election / Availability
• Consensus / Availability
• Fail Safe / Availability
• Fail Secure / Availability
• Single Source of Truth / Availability
• Consistency / Availability

Reinforced by

• Eventual Consistency
• Horizontal Scaling
• Load Balancing
• Failover
• Replication
• Blue-Green Deployment

Linked from

• Separate, trade, or mitigate
• Architectural rules and principles
• Control / Coordination / Centralization
• Event / Messaging / Asynchronous Architecture
• Error Handling / Resilience
• Scalability / Performance / Optimization
• Self-Healing / Recovery / Deployment Safety
• Schema / Canonical Data / Semantics
• Transactions / State / Concurrency
• The resolutions