# Partitioning

> A technique for dividing data or work into independent partitions by a key, so each can be processed in parallel.

Record: `architecture:partitioning`
Kind: technique
Layer: [Performance Core](https://banes-lab.com/records/layer/performance-core.md)
Severity: contextual
Scope: data, workload, service
Canonical: https://banes-lab.com/ontology#architecture-partitioning

Listed in [Architecture principles](https://banes-lab.com/api/records/architecture.md), after [Sharding](https://banes-lab.com/records/architecture/sharding.md) and before [Caching](https://banes-lab.com/records/architecture/caching.md).

## Repair

- Refactored by: Add Partition Key, Split Workload
- Detected by: hotspot resource usage
- Violated by: no partitioning for unbounded workload
- Measured by: partition balance
- Enforced by: [architecture review](https://banes-lab.com/records/architecture/architecture-review.md)

## Requires

- [Partition Strategy](https://banes-lab.com/records/lexicon/partition-strategy.md)

## Reinforces

- [Scalability](https://banes-lab.com/records/architecture/scalability.md)
- [Isolation](https://banes-lab.com/records/architecture/isolation.md)

## Enables

- [Parallelism](https://banes-lab.com/records/architecture/parallelism.md)

## Conflicts with

- [Global Shared State](https://banes-lab.com/records/lexicon/global-shared-state.md)

## In tension with

- [Rebalancing Complexity](https://banes-lab.com/records/lexicon/rebalancing-complexity.md)

## Tensions

- [Partitioning / Rebalancing Complexity](https://banes-lab.com/records/tension/partitioning-rebalancing-complexity.md)

## Severity

- [contextual](https://banes-lab.com/records/vocabulary/severity-contextual.md)

## Category

- [Scalability / Performance / Optimization](https://banes-lab.com/records/architecture-category/scalability-performance-optimization.md)

## Linked from

- [A concern is a component](https://banes-lab.com/software-architecture/scale/a-concern-is-a-component.md)
- [Scalability / Performance / Optimization](https://banes-lab.com/ontology/principles/architecture-category-scalability-performance-optimization.md)
- [Transactions / State / Concurrency](https://banes-lab.com/ontology/principles/architecture-category-transactions-state-concurrency.md)
- [Scalability / Performance / Optimization](https://banes-lab.com/ontology/lexicon/lexicon-category-scalability-performance-optimization.md)
- [Severity levels](https://banes-lab.com/ontology/schema/the-vocabulary-severity.md)
- [The resolutions](https://banes-lab.com/ontology/schema/the-resolutions.md)