Azure Disaster Recovery Architecture for Enterprise Hybrid Cloud - by Saleem Yousaf

Modern enterprise DR in Azure must support:
• Same-region failover
• Cross-region failover
• Hybrid cloud continuity
• PaaS and IaaS recovery
Key Azure DR Components
Same Region
• Availability Zones
• Zone-redundant SQL
• ZRS Storage
Multi Region
• Azure Site Recovery
• Front Door
• Traffic Manager
• Geo-replication
Hybrid
• ExpressRoute failover
• VPN backup
• Active Directory replication

Azure Storage Replication
Choosing the correct storage replication model is critical.
Type DR Capability
LRS None
ZRS Zone
GRS Regional
RA-GZRS Enterprise DR

SQL Disaster Recovery
Recommended enterprise SQL controls:
• Auto Failover Groups
• Geo-replication
• Zone redundancy
• Backup retention

DR Testing Matters
Recommended cadence:
• Monthly restore testing
• Quarterly failover testing
• Annual enterprise DR simulation

Final Thoughts
Cloud DR is now part of enterprise architecture, security and operations.
The focus should be:
• Automation
• Repeatability
• Testing
• Security preservation

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