# Architecture principles whose scope is stream

> 9 records

This index as JSON: https://banes-lab.com/json/api/facets/architecture/scope/stream

## Entries

- [Event Ordering](https://banes-lab.com/records/architecture/event-ordering.md): A rule or precondition that a stateful consumer processes the events of one key in their sequence order.
- [Append-Only Log](https://banes-lab.com/records/architecture/append-only-log.md): A design pattern that records history as immutable entries added at the end of the log.
- [Backpressure](https://banes-lab.com/records/architecture/backpressure.md): A mechanism that lets a consumer signal its capacity, so a producer slows down when the consumer falls behind.
- [Memory Efficiency](https://banes-lab.com/records/architecture/memory-efficiency.md): The degree to which a process handles its input with bounded memory, by streaming or chunking instead of loading it whole.
- [Single-Pass Processing](https://banes-lab.com/records/architecture/single-pass-processing.md): A design rule that large input is read once, with every result it feeds computed in that one pass.
- [Lazy Evaluation](https://banes-lab.com/records/architecture/lazy-evaluation.md): An approach in which a value is computed only when something consumes it.
- [Sequential Access](https://banes-lab.com/records/architecture/sequential-access.md): A design pattern that reads a source in its stored order through a cursor or scan, instead of looking records up one by one.
- [Forward-Only Processing](https://banes-lab.com/records/architecture/forward-only-processing.md): A rule or precondition that a stream is read once in order, keeping only rolling state, so no decision ever needs to revisit earlier input.
- [Dataflow Architecture](https://banes-lab.com/records/architecture/dataflow-architecture.md): A convention of arranging processing as a graph of stages connected by explicit data edges, where a stage runs when its inputs arrive.