A financial software company is migrating an on-premises document management system to Azure. The system requires a shared file storage solution accessible over SMB that can support an active-active configuration across multiple compute instances. The solution must guarantee single-digit millisecond latency for file operations and must survive the failure of an entire datacenter in the primary region without any data loss or application downtime. Which storage tier and redundancy option should you recommend to meet these requirements?
- APremium Azure Files configured with Locally Redundant Storage (LRS)
- Premium Azure Files configured with Zone-Redundant Storage (ZRS)Answer
- CPremium Azure Files configured with Geo-Redundant Storage (GRS)
- DStandard Azure Files configured with Zone-Redundant Storage (ZRS)
Answer
Premium Azure Files configured with Zone-Redundant Storage (ZRS)
The correct answer is Premium Azure Files configured with Zone-Redundant Storage (ZRS). Premium Azure Files is backed by SSDs to guarantee the required single-digit millisecond latency. Configuring it with ZRS ensures data is replicated synchronously across three availability zones, allowing it to survive a datacenter failure in the primary region without downtime or data loss.
Step-by-Step Solution
Key Concept
Premium Azure Files supports only LRS and ZRS configurations, and ZRS must be chosen to satisfy both low-latency performance and zone-outage resilience.