# Single Copy State

> Keeping only one copy of state, so its loss or unavailability takes down the whole system.

Record: `lex:single-copy-state`
Kind: anti-pattern
Layer: [Correctness Core](https://banes-lab.com/records/layer/correctness-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lex-single-copy-state

## category

- [Self-Healing / Recovery / Deployment Safety](https://banes-lab.com/records/lex-category/self-healing-recovery-deployment-safety.md)

## referenced-by

- [Replication](https://banes-lab.com/records/arch/replication.md)