Scalability

Kind: quality-attribute

Layer: Performance Core

Record: architecture:scalability

Severity: contextual

Scope: service, system, infrastructure

Canonical: Ontology

The degree to which a system keeps its throughput and latency as load grows, by adding resources.

Listed in Architecture principles, after Flyweight Pattern and before Horizontal Scaling.

Requires

• Load Model
• Bottleneck Awareness

Reinforces

• Performance Engineering

Enables

• Growth Handling

Conflicts with

• Fixed-Capacity Design

In tension with

• Simplicity
• Consistency

Tensions

• Scalability / Simplicity
• Scalability / Consistency

Violated by

• Bottlenecks

Refactored by

• Caching
• Partitioning
• Introduce Async Event
• Horizontal Scaling

Severity

• contextual

Category

• Scalability / Performance / Optimization

Reinforced by

• Service Discovery
• Message Broker
• Command Query Responsibility Segregation
• Eventual Consistency
• Elasticity
• Load Balancing
• Throughput
• Algorithmic Efficiency
• Memory Efficiency
• Stateless Processing
• Replication
• Microservices

Linked from

• Above one tier, reduction
• Scale follows determinism
• Runtime Discovery / Dynamic Binding
• Event / Messaging / Asynchronous Architecture
• Scalability / Performance / Optimization
• Streaming / Pipeline / Dataflow Processing
• Self-Healing / Recovery / Deployment Safety
• Codebase / System Architecture Styles
• Transactions / State / Concurrency
• Event Messaging Async
• Quality Attributes
• Scalability / Performance / Optimization
• Severity levels
• The resolutions