70-473 · Question #123
You plan to deploy a highly available Microsoft SQL Server solution in Microsoft Azure to two virtual machines. Each virtual machine contains an OS disk and four data disks. You plan to configure both
The correct answer is C. Always On availability groups. To provide a highly available SQL Server solution across two Azure virtual machines with local disks and a shared public IP, ensuring database availability if a server fails, Always On availability groups are recommended.
Question
Options
- Alog shipping
- BAlways On Failover Cluster Instances
- CAlways On availability groups
- Ddatabase mirroring
How the community answered
(32 responses)- A3% (1)
- B6% (2)
- C81% (26)
- D9% (3)
Why each option
To provide a highly available SQL Server solution across two Azure virtual machines with local disks and a shared public IP, ensuring database availability if a server fails, Always On availability groups are recommended.
Log shipping is a disaster recovery solution that sends transaction log backups periodically and does not provide automatic failover for high availability.
Always On Failover Cluster Instances (FCIs) require shared storage, which is not implied by the description of local data disks, and provide instance-level rather than database-level high availability.
Always On availability groups provide high availability for a set of user databases, offering automatic failover and supporting a listener for client connections that can be configured with an Azure Load Balancer for a shared public IP. This ensures database availability across multiple independent SQL Server instances if a single server fails.
Database mirroring is a deprecated feature for high availability of a single database, superseded by Always On availability groups, and does not scale well for multiple databases.
Concept tested: SQL Server Always On Availability Groups in Azure
Source: https://learn.microsoft.com/en-us/azure/azure-sql/virtual-machines/windows/availability-group-overview
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