# Bulkhead Pattern

> A design pattern that gives each workload its own pool of threads or connections, so one workload cannot exhaust the others.

Record: `architecture:bulkhead-pattern`
Kind: pattern
Layer: [Correctness Core](https://banes-lab.com/records/layer/correctness-core.md)
Severity: contextual
Scope: resource pool, service, runtime
Canonical: https://banes-lab.com/ontology#architecture-bulkhead-pattern

Listed in [Architecture principles](https://banes-lab.com/api/records/architecture.md), after [Circuit Breaker Pattern](https://banes-lab.com/records/architecture/circuit-breaker-pattern.md) and before [Backpressure](https://banes-lab.com/records/architecture/backpressure.md).

## Repair

- Refactored by: Split Resource Pools, Add Isolation
- Detected by: shared pools across critical/noncritical workloads
- Violated by: one dependency consuming all threads/connections
- Measured by: resource saturation isolation
- Enforced by: resource policy

## Requires

- [Resource Isolation](https://banes-lab.com/records/lexicon/resource-isolation.md)

## Reinforces

- [Fault Isolation](https://banes-lab.com/records/lexicon/fault-isolation.md)

## Enables

- [Blast-Radius Reduction](https://banes-lab.com/records/lexicon/blast-radius-reduction.md)

## Conflicts with

- [Shared Resource Pool](https://banes-lab.com/records/lexicon/shared-resource-pool.md)

## In tension with

- [Resource Utilization](https://banes-lab.com/records/architecture/resource-utilization.md)

## Tensions

- [Bulkhead Pattern / Resource Utilization](https://banes-lab.com/records/tension/bulkhead-pattern-resource-utilization.md)

## Severity

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

## Category

- [Error Handling / Resilience](https://banes-lab.com/records/architecture-category/error-handling-resilience.md)

## Linked from

- [Scalability / Performance / Optimization](https://banes-lab.com/ontology/principles/architecture-category-scalability-performance-optimization.md)
- [Error Handling / Resilience](https://banes-lab.com/ontology/lexicon/lexicon-category-error-handling-resilience.md)
- [Quality Attributes](https://banes-lab.com/ontology/lexicon/lexicon-category-quality-attributes.md)
- [Severity levels](https://banes-lab.com/ontology/schema/the-vocabulary-severity.md)
- [The resolutions](https://banes-lab.com/ontology/schema/the-resolutions.md)