Terminology

2225 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 areas2225 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 Architecture74 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 Architecture69 Streaming & Real-Time Data69 Data Governance & Semantics74 Frontend & Experience Architecture66 Edge, Mobile & IoT68 Regulatory & Data Protection Architecture65 Assurance, Audit & Model Risk69

Kind Any concept801 practice736 pattern377 metric127 case-study77 tool62 protocol45

4 terms shown.

Term	Kind	Topic	What it is
Completeness Indicator As-Of Metadata, Result Confidence Marker	practice	Streaming SLOs	Metadata published alongside a streaming result stating how current it is and what proportion of expected input it reflects - so consumers can reason about staleness instead of assuming currency.
Completeness SLO Did Everything Arrive, Delivery Completeness	metric	Streaming SLOs	The proportion of produced events that actually reached the destination - the streaming SLO that is measured least often and whose absence conceals the most damaging failure.
Consumer Lag	metric	Streaming SLOs	The gap between the latest offset written to a partition and the offset a consumer group has processed, expressed in records or in time.
Idle Source Stall Watermark Stall, Silent Pipeline Halt, Quiet Partition Problem	concept	Streaming SLOs	A stream processor whose event-time progress halts because one partition or source has stopped producing - so output ceases entirely while every component reports healthy.