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When implementing a hybrid deployment of Microsoft Azure SQL solutions, it is crucial to evaluate high availability (HA) and disaster recovery (DR) options. HA/DR ensures the availability and resiliency of your SQL databases, protecting against potential downtime and data loss. In this article, we will explore the various HA/DR strategies you can employ for hybrid deployments in accordance with the guidelines provided by Microsoft.
A hybrid deployment involves combining on-premises and cloud-based resources. It allows you to leverage the benefits of cloud computing while maintaining certain workloads locally. In the context of Azure SQL solutions, this typically means having on-premises SQL Server instances alongside Azure SQL Databases or Managed Instances.
For on-premises SQL Server instances, HA can be achieved using features like failover clustering and database mirroring. Failover clustering enables multiple SQL Server instances to work together, providing failover support in case one becomes unavailable. Database mirroring, on the other hand, allows databases to have hot standby copies on separate servers, ensuring data availability.
Azure offers several HA/DR options for hybrid deployments:
When evaluating HA/DR strategies for hybrid deployments, consider the following aspects:
After selecting the appropriate HA/DR strategy for your hybrid deployment, thoroughly test the failover and recovery processes. Regularly perform drills and exercises to ensure that your HA/DR mechanisms are functioning as expected and meeting the defined RPO and RTO objectives.
In conclusion, evaluating HA/DR options is essential when deploying hybrid Azure SQL solutions. By understanding the available options and considering factors like RPO, RTO, bandwidth, latency, and costs, you can implement a robust and resilient architecture. Remember to regularly test your HA/DR mechanisms to maintain confidence in the recoverability of your hybrid deployment.
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Answer: a, c
Answer: c
Answer: True
Answer: a, d
Answer: True
Answer: c
Answer: False
Answer: b, c
Answer: c
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