# Architecture principles whose scope is scalability

> 3 records

This index as JSON: https://banes-lab.com/json/api/facets/architecture/scope/scalability

## Entries

- [Competing Consumers](https://banes-lab.com/records/architecture/competing-consumers.md): A design pattern in which several consumers read from one queue, and each message goes to only one of them.
- [Read Replica](https://banes-lab.com/records/architecture/read-replica.md): A technique for routing read queries to replicated copies of a database, so the primary handles only writes.
- [Space-Based Architecture](https://banes-lab.com/records/architecture/space-based-architecture.md): A convention of holding working state in a replicated in-memory space, so no central database limits scaling.