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Additionally, you can use read replicas as a warm standby solution in a different Availability Zone than your primary or secondary DB instance, where you can promote the replica to a Single-AZ instance based on your business needs. Read replicas contain near-real-time data from the primary DB instance, and you can use them to offload the read-only workload from the primary DB instance, such as analytical or reporting type of queries that can tolerate some latency in data updates. In a Multi-AZ configuration with a read replica, transactions committed on the primary DB instance are synchronously replicated to a secondary replica for high availability purposes and asynchronously sent to the read replica for read scale out. Multi-AZ configuration with read replicas Read replicas are supported on Enterprise Edition in the Multi-AZ configuration on SQL Server 2016 Service Pack 2 Cumulative Update 3 (.0.v1) or higher.
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#Aws rds sql server connection string how to
This post goes over the architecture of read replicas, how to create a read replica, and how to monitor it. Amazon RDS uses a domain-independent Windows Server Failover Cluster (WSFC) for this architecture. The members of the distributed availability group are the availability groups themselves. A distributed availability group is an availability group that spans two separate availability groups.
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Read replicas use the built-in distributed availability groups feature and are available for Enterprise Edition. Amazon RDS for SQL Server now supports in-Region read replicas, which give you the ability to offload your read workloads from your primary database instance to a replica.