# Instance Affinity

> Binding a client to a specific server instance for its state, preventing free rebalancing across instances.

Record: `lexicon:instance-affinity`
Kind: anti-pattern
Layer: [Performance Core](https://banes-lab.com/records/layer/performance-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-instance-affinity

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Inefficient Algorithm Choice](https://banes-lab.com/records/lexicon/inefficient-algorithm-choice.md) and before [Instance-Local State](https://banes-lab.com/records/lexicon/instance-local-state.md).

## Category

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

## Negated by

- [Statelessness](https://banes-lab.com/records/architecture/statelessness.md)

## Linked from

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