Availability replicas Zobrazit ještě 10 Applies to: SQL ServerThis article introduces the Always On availability groups concepts that are central for configuring and managing one or more availability groups in the Enterprise edition of SQL Server. For the Standard ...
Applies to: SQL ServerThis article introduces the Always On availability groups concepts that are central for configuring and managing one or more availability groups in the Enterprise edition of SQL Server. For the Standard edition, review Basic Always On availability groups for a single database....
SQL Server 2017 introduced two different architectures for availability groups.Always On availability groupsprovide high availability, disaster recovery, and read-scale balancing. These availability groups require a cluster manager. In Windows, the failover clustering feature prov...
SQL Server 2017 introduced two different architectures for availability groups.Always On availability groupsprovide high availability, disaster recovery, and read-scale balancing. These availability groups require a cluster manager. In Windows, the failover clustering feature pr...
An introduction to the concepts that are central for configuring and managing Always On availability groups for high-availability and disaster-recovery.
Each of these server instances must be enabled for AlwaysOn.A given instance can host only one availability replica per availability group. However, each instance can be used for many availability groups. A given instance can be either a stand-alone instance or a SQL Server failover cluster ...
MultiSubnetFailover is a new connection string keyword used to enable faster failover with Always On availability groups and Always On Failover Cluster Instances in SQL Server 2012. The following three subfeatures are enabled when MultiSubnetFailover=True is set in connection string: Faster multi-...
ALTER AVAILABILITY GROUP [ag] MODIFY REPLICA ON N'SQL16N3' WITH (SECONDARY_ROLE(ALLOW_CONNECTIONS = READ_ONLY)) GO 2 Configure read-only routing URL For each secondary replica, define the address to connect to it: ALTER AVAILABILITY GROUP ag MODIFY REPLICA ON N'...
Availability groups must be created with theCREATE AVAILABILITY GROUP命令和WITH DTC_SUPPORT = PER_DB子句创建可用性组。 当前不可更改现有可用性组。 将加入可用性组的所有 SQL Server 实例都必须为 SQL Server 2016 或更高版本。 不支持分布式事务
对于辅助副本上的备份,该副本必须处于已同步或正在同步状态。您可以在一个 SQL Server 集群中具有多个 AlwaysOn 可用性组 (AAG)。您还可以在 SQL Server 集群上混合使用标准数据库和 AAG。 备份数据时,可以分布备份工作负载以实现可扩展性,并可将备份活动隔离到专用备份节点。通过隔离备份活动,能最大限度降低...