Terminology

2205 terms, tools, patterns and metrics an architect is expected to use precisely. Each one gets a short explanation of what it is, and — where it matters — what it is commonly confused with. Search filters as you type; the column headers sort.

All areas2205 Architecture Fundamentals77 Distributed Systems107 Data Architecture110 Cloud Architecture94 Networking88 API & Integration Architecture82 Reliability & Resilience75 Observability70 Performance & Capacity Engineering72 Security Architecture86 Cost Architecture & FinOps71 Business Architecture67 Architecture Communication67 Enterprise Architecture66 Legacy Modernization71 AI-Era Architecture69 Software Architecture & Engineering71 Architecture Patterns71 Architecture Decision-Making63 The Architect's Meta-Skills61 Delivery & Release Engineering66 Platform Engineering & Developer Experience70 Testing & Quality Architecture66 Data Platform Architecture64 Streaming & Real-Time Data69 Data Governance & Semantics69 Frontend & Experience Architecture66 Edge, Mobile & IoT68 Regulatory & Data Protection Architecture65 Assurance, Audit & Model Risk64

Kind Any concept794 practice734 pattern368 metric125 case-study77 tool62 protocol45

3 terms shown.

Term	Kind	Topic	What it is
Expand-Contract Migration Parallel Change, Add-Migrate-Remove, N-1 Compatibility	pattern	Zero-Downtime Migration	Making a breaking change as a sequence of individually reversible steps - add the new alongside the old, migrate readers and writers across, then remove the old - so that at no point is a rollback destructive.
Zero-Downtime Cutover	practice	Zero-Downtime Migration	Moving a live system to a new implementation or datastore without an outage, using dual writes, backfill and a reversible traffic switch.
Zero-Downtime Deployment in Practice Rolling Deployment, Online Schema Change	practice	Zero-Downtime Migration	Shipping without a maintenance window, and the version-skew constraint that governs every schema and contract change.