I am planning to implement a Disaster Recovery (DR) strategy for the Azure Storage Account, specifically for Blob Storage. Our requirement is to achieve an RPO (Recovery Point Objective) of 0 minutes. We need a suitable solution to meet this requirement

Hi @Gadikoya Chandrareddy,

Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.

With Azure Blob Storage geo-redundancy and Geo-Priority Replication, the SLA for supported Block Blob workloads states that the “Last Sync Time … remains lagged by 15 minutes or less for 99% of the billing month” when the feature is enabled. Replication across regions remains asynchronous, even with priority enabled, so a true RPO = 0 minutes cannot be achieved using only the built-in geo-redundant storage replication options.

Therefore, if your business requires zero data loss (RPO = 0) during a regional disaster, you must either implement additional synchronous replication at the application layer or use a service that provides true synchronous multi-region writes.

Microsoft does not offer any native Azure Storage architectures that guarantee an RPO of 0 minutes across regions. All geo-redundant storage options (GRS/GZRS, including Geo-Priority Replication) use asynchronous replication, which means some data loss is always possible during a regional outage.

The cross-region replication typically has a lag of less than 15 minutes, but this is an estimate and not an SLA-backed guarantee. If Microsoft introduces any changes to RPO guarantees in the future, they will be reflected in the official Azure documentation.

Refer: Azure Storage Geo Priority Replication and Azure Storage redundancy

Kindly let us know if the above helps or you need further assistance on this issue.

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Hello Gadikoya Chandrareddy,

Welcome to the Microsoft Q&A and thank you for posting your questions here.

Regarding your planning, achieving zero RPO for Azure Blob Storage or similar services is challenging because Azure’s native geo-replication is asynchronous and cannot guarantee zero data loss. The misconception often arises from assuming that Geo-Priority Replication (GPR) or GRS provides synchronous replication, but in reality, these options only reduce lag to about 15 minutes. Therefore, if your requirement is strict zero RPO, relying solely on built-in redundancy will not meet your expectations.

The best practice from me as a solution architect, design an active-active architecture where your application writes data to multiple regions simultaneously. This can be implemented using Azure Front Door or Traffic Manager for global load balancing, combined with application-level logic to handle synchronous writes and conflict resolution. For structured data scenarios, Azure Cosmos DB with multi-master configuration is the most reliable option because it supports true multi-region writes with guaranteed consistency. Reference: Cosmos DB Multi-Master.

If your workload depends on blob or file semantics and zero RPO is non-negotiable, you will need to integrate third-party solutions like Pure Storage ActiveCluster or NetApp Cloud Volumes ONTAP, which offer synchronous replication across regions. Alternatively, implement custom logic to write to two Azure regions concurrently using the Blob Storage SDK: await`` blobClientPrimary.UploadAsync(stream);

This approach ensures data is committed in both regions before acknowledging success. For more details, check Azure Storage Redundancy and Active-Active Patterns for more details.

I hope this is helpful! Do not hesitate to let me know if you have any other questions or clarifications.

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