# Change Ceph Data Replication

> By default, Ceph data replication is configured with a replication factor of three to ensure maximum fault tolerance and data protection. This setting is automatically applied during CubeCOS installation.

By default, Ceph data replication is configured with a replication factor of three to ensure maximum fault tolerance and data protection. This setting is automatically applied during CubeCOS installation.

## Accessing CubeCOS cluster VIP via SSH {#accessing-cubecos-cluster-vip-via-ssh}

```bash
ssh admin@192.168.1.x

Warning: Permanently added '192.168.1.x' (ECDSA) to the list of known hosts.
Password:
```

## Change the Replication {#change-the-replication}

Use command `storage > rebalance`

:::warning

Lowering the replication factor decreases data protection and increases the risk of data loss if an OSD failure occurs. For production clusters, reducing the replication factor is not recommended.

:::

:::danger

Any changes to rebalancing or the replication factor can negatively impact active client I/O operations. It is recommended to perform these modifications during maintenance windows or be fully aware of the potential performance impact on active clients in the cluster.

```bash
controller> storage
controller:storage> rebalance
Input replication factor(1/2/3): 2
```