# Microservices

> A convention of splitting a system into services that each own their data and deploy independently.

Record: `architecture:microservices`
Kind: style
Layer: [Structural Core](https://banes-lab.com/records/layer/structural-core.md)
Severity: contextual
Scope: system, service, deployment
Canonical: https://banes-lab.com/ontology#architecture-microservices

Listed in [Architecture principles](https://banes-lab.com/api/records/architecture.md), after [Package by Feature](https://banes-lab.com/records/architecture/package-by-feature.md) and before [Monolith Architecture](https://banes-lab.com/records/architecture/monolith-architecture.md).

## Repair

- Refactored by: Split Service, [Own Data](https://banes-lab.com/records/lexicon/own-data.md), Add Events
- Detected by: deployment coupling, cross-service transactions
- Violated by: shared databases, synchronous service chains
- Measured by: deploy independence, coupling metrics
- Enforced by: service ownership, API contracts

## Requires

- [Autonomy](https://banes-lab.com/records/architecture/autonomy.md)
- [Independent Deployment](https://banes-lab.com/records/lexicon/independent-deployment.md)

## Reinforces

- [Scalability](https://banes-lab.com/records/architecture/scalability.md)
- [Bounded Context](https://banes-lab.com/records/architecture/bounded-context.md)

## Enables

- [Decentralized Ownership](https://banes-lab.com/records/lexicon/decentralized-ownership.md)

## Conflicts with

- [Distributed Monolith](https://banes-lab.com/records/architecture/distributed-monolith.md)

## In tension with

- [Operational Complexity](https://banes-lab.com/records/lexicon/operational-complexity.md)
- [Consistency](https://banes-lab.com/records/architecture/consistency.md)

## Tensions

- [Microservices / Operational Complexity](https://banes-lab.com/records/tension/microservices-operational-complexity.md)
- [Microservices / Consistency](https://banes-lab.com/records/tension/consistency-microservices.md)

## Severity

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

## Category

- [Codebase / System Architecture Styles](https://banes-lab.com/records/architecture-category/codebase-system-architecture-styles.md)

## Reinforced by

- [Decentralization](https://banes-lab.com/records/architecture/decentralization.md)

## Linked from

- [Anti-patterns](https://banes-lab.com/ontology/principles/architecture-category-anti-patterns.md)
- [Domain Architecture](https://banes-lab.com/ontology/principles/architecture-category-domain-architecture.md)
- [Control / Coordination / Centralization](https://banes-lab.com/ontology/principles/architecture-category-control-coordination-centralization.md)
- [Core Modular Design](https://banes-lab.com/ontology/principles/architecture-category-core-modular-design.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)
- [Codebase / System Architecture Styles](https://banes-lab.com/ontology/lexicon/lexicon-category-codebase-system-architecture-styles.md)
- [Core Vocabulary](https://banes-lab.com/ontology/lexicon/lexicon-category-core-vocabulary.md)
- [Severity levels](https://banes-lab.com/ontology/schema/the-vocabulary-severity.md)
- [The resolutions](https://banes-lab.com/ontology/schema/the-resolutions.md)