# 12. Cluster Reference

As of 2.0 CouchDB now have two modes of operations:
  - Standalone
  - Cluster

This part of the documentation is about setting up and maintain a CouchDB cluster.

- 12.1. Set Up
  - 12.1.1. Firewall
  - 12.1.2. The Cluster Setup Wizard
  - 12.1.3. The Cluster Setup API
- 12.2. Theory
- 12.3. Node Management
  - 12.3.1. Adding a node
  - 12.3.2. Removing a node
- 12.4. Database Management
  - 12.4.1. Creating a database
  - 12.4.2. Deleting a database
  - 12.4.3. Placing a database on specific nodes
- 12.5. Sharding
  - 12.5.1. Scaling out
  - 12.5.2. Moving Shards
  - 12.5.3. Views
  - 12.5.4. Reshard? No, Preshard!