HA Database Guides (SQL and NoSQL)
We added a new CouchDB NoSQL synced databases guide on the manual. This guide shows you all the steps necessary to set up 2-VM synced databases on the grid. The steps for a deployment with more than 2 VMs are the same, simply deploy more than 2 VMs and follow the guide!
The Outcome, The Use Case
In short, any changes on one of the VM’s database gets reflected to the other VM’s database. This can be very useful if you want to achieve high availability storage for your deployments.
You could have an app running and getting in sync with the databases, and if one of the VMs goes down, you’d still have access to the database! A good practice would be to deploy the two VMs in different availability zones (AZ), e.g. one in Canada and one in the USA.
Synced Databases Guide Links
As a reminder, we already had an SQL version of this guide, for MariaDB.
Now we also have the CouchDB NoSQL version of the guide.
HA Series
These guides are part of the HA guide series to ensure users of the grid have the knowledge and tools to build highly available deployments.
As a reminder, we also have:
- A simple HA Kubernetes many control plane nodes guide:
- A forum post providing insights into how to set up HA deployments:
Feedback and Suggestions
Have you ever tried any kind of HA deployments on the grid?
What other type of HA deployment would you want to explore? We’ll be happy to discuss the possibilities with you.
Thanks for reading and happy deployment 
!