> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help-legacy.galaxycloud.app/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# High-availability [Meteor Apps]

**Learn how to make your app fault tolerant by enabling high-availability**

High-availability increases the likelihood that your app stays up in the event of unforeseen container, machine, or availability zone failures. We recommend high-availability for all business critical and production apps. Galaxy supports high-availability by default.

Just run three or more Standard containers to enable it for your app. You'll see "HA" in a golden box next to any apps where high-availability is enabled.

### Turn high-availability on

1. Check if your app has enabled high-availability on the app overview page.
   
![App Overview](https://storage.crisp.chat/users/helpdesk/website/273b1dc6f4f43800/image_uzabgs.png)

2. Change the container size to Standard or larger in your app settings.
  
![Change Container Size](https://storage.crisp.chat/users/helpdesk/website/273b1dc6f4f43800/image_ag4yy4.png)

3. Add three or more containers on the app overview page

![Add Containers](https://storage.crisp.chat/users/helpdesk/website/273b1dc6f4f43800/email-scale-up_1d7lsmt.gif)

4. Verify that it's enabled via the UI

![High-availability Enabled](https://storage.crisp.chat/users/helpdesk/website/273b1dc6f4f43800/arc-2024-07-15-144127_1e3jnnf.png)

### How we do it

For deployments with three or more Standard containers, Galaxy will distribute an app's containers to different availability zones in the same region. Dividing infrastructure across multiple data centers ensures that high-availability apps are fault tolerant.