Why Backup & Recovery?
Azure admins must ensure workloads are resilient against data loss, corruption, or outages.
The exam expects you to know which tool to use in which situation.
Azure Backup
-
Simple, reliable, and cost-effective backup solution.
-
Works with VMs, SQL, file shares, and more.
-
Stores backups in Recovery Services Vault.
-
Provides application-consistent backups (not just file copies).
-
Can schedule daily/weekly backups and configure retention policies.
Use Case: Backup all company VMs to a Recovery Services Vault.
VM Snapshots
-
Point-in-time backup of a disk.
-
Crash-consistent (like unplugging a machine and saving disk state).
-
Useful for quick backup before patching or testing.
-
Not a full backup solution (no retention or scheduling).
Use Case: Take snapshot of a VM’s OS disk before installing updates.
Azure Site Recovery (ASR)
-
Disaster recovery solution.
-
Replicates workloads to a secondary Azure region or on-prem → Azure.
-
Provides failover & failback.
-
Ensures business continuity during major outages.
Use Case: Replicate a critical VM to another region so it can failover if the primary region goes down.
Confusion Buster 🚨
-
Backup vs Snapshot vs ASR
-
Backup = scheduled, long-term, full recovery solution.
-
Snapshot = one-time, short-term, crash-consistent copy.
-
ASR = disaster recovery with replication & failover.
-
Exam trap: If the question mentions “compliance” or “long-term retention,” → Backup. If it says “quick rollback before updates,” → Snapshot. If it says “replicate to another region,” → Site Recovery.
Simple Example
A company protects workloads as follows:
-
Runs Azure Backup for daily VM backups stored in Recovery Services Vault.
-
Takes snapshots before major patching.
-
Uses Site Recovery to replicate production servers to a paired region for DR.
Exam Tip
-
Recovery Services Vault = backup storage.
-
Snapshot = fast, short-term.
-
ASR = cross-region disaster recovery.
-
If scenario mentions failover, answer is Site Recovery.
What to Expect in the Exam
-
Direct Q: “Which feature replicates VMs to another region for DR?” → ASR.
-
Scenario: “Company needs daily backups with 30-day retention.” → Azure Backup.
-
Trick Q: “Snapshots are the same as VM backups.” (False — backups are scheduled and application-consistent).