Sequential Access

Kind: pattern

Layer: Execution Core

Record: architecture:sequential-access

Severity: contextual

Scope: file, stream, iterator

Canonical: Ontology

A design pattern that reads a source in its stored order through a cursor or scan, instead of looking records up one by one.

Listed in Architecture principles, after Lazy Evaluation and before Forward-Only Processing.

Requires

• Ordered Read Model

Reinforces

• Memory Efficiency

Enables

• Large Data Processing

In tension with

• Lookup Performance
• Random Access Requirement

Tensions

• Sequential Access / Lookup Performance
• Sequential Access / Random Access Requirement

Violated by

• Random Access over a Stream

Severity

• contextual

Category

• Streaming / Pipeline / Dataflow Processing

Refactors

• Space Complexity

Linked from

• Scalability / Performance / Optimization
• Streaming / Pipeline / Dataflow Processing
• Severity levels
• The resolutions