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Azure Disaster Recovery Strategy RRS feed

  • Question

  • I am creating a DR reference architecture across 2 azure regions, to support both Active Active (critical workloads) and Active Passive (non critical workloads).

    Components - Azure Traffic Manager, Azure Site Recovery and Backup

    Active Active Questions:

    1. If Azure Traffic Manager is configured with Weighted based algorithm, how does all 3 tiers synchronize on any configurations.

    2. How does Data tier replicate and maintain consistency to avoid any data loss during fail over. 

    3. Does ASR have a role to play in this usecase as both regions are having same resources and incoming traffic is distributing across both regions.

    Active Passive Questions: (COLD)

    1. How do we ensure microsoft has got capacity available for sizes/configurations of resources during DR. Assuming primary region has 1000's of VM's and DR site doesnt support that specific capacity?  

    Prasad Chundi

    Friday, October 25, 2019 5:39 PM

All replies

  • @Prasad Chundi Apologies for delay in the response. 

    You might need to share a little more detail on the architecture you’re creating. 

    Your first question is a little unclear. What do you mean by “how does all 3 tiers synchronize on any configurations.”? That’s dependant on the application architecture. For Traffic Manager, take a look at this article: Protecting multi-region enterprise applications. It explains how you can use Azure Traffic Manager’s Geographic routing method with ASR.

    For the data tier, it is generally recommended to leverage the native replication in the data technology (ie. SQL Always On Availability Groups). For a SQL reference, see Set up disaster recovery for SQL Server.

    If you’re using an active-active architecture, ASR cannot be used to keep SiteA in sync with SiteB (from a live data perspective). That should be a part of the deployment (ie. blue-green, push to ProdA, then ProdB) of the solution, and it’s ongoing maintenance.

    For the active-passive question, take a look at this info: How is capacity guaranteed in the target region? It states:

    The Site Recovery team works with the Azure capacity management team to plan sufficient infrastructure capacity, and to help ensure that VMs protected by Site Recovery for will successfully be deployed target region when failover is initiated.

    Monday, November 4, 2019 4:38 AM
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    Tuesday, November 19, 2019 3:26 AM