Cloud Backups and Disaster Recovery: A Practical Guide

Every organisation that stores data needs a backup strategy. This is not a controversial statement, yet a surprising number of teams either have no backups at all, or have backups they have never tested. A backup that has not been restored is not a backup — it is a hypothesis.

Building a reliable backup and disaster recovery strategy does not have to be complex or expensive. It does require intentional design and regular testing.

Define Your Recovery Objectives

Before choosing backup tools or schedules, define two key metrics. Recovery Time Objective (RTO) is the maximum acceptable time to restore service after an incident. Recovery Point Objective (RPO) is the maximum acceptable data loss, expressed as time — for example, "we can tolerate losing up to one hour of data."

These objectives drive your backup frequency and recovery architecture. A business-critical database with an RPO of one hour needs hourly backups at minimum. A development environment with an RPO of 24 hours can get by with daily snapshots.

The 3-2-1 Backup Rule

The 3-2-1 rule is a time-tested framework: keep 3 copies of your data, on 2 different storage media, with 1 copy offsite. In cloud terms, this typically means: your live data, a snapshot or backup in the same region, and a copy in a different region or cloud provider.

The offsite copy is critical. A regional outage, ransomware attack, or accidental deletion can affect all resources in a single account or region simultaneously. An isolated offsite copy is your last line of defence.

Test Your Backups Regularly

Schedule a restore test at least quarterly. Spin up a clean environment, restore from backup, and verify that the application starts and data is intact. Document the process so that anyone on your team can execute a recovery under pressure.

Automated backup verification — scripts that restore a backup and run basic sanity checks — can provide continuous confidence without manual effort. The goal is to discover backup failures before you need the backup, not after.