December 2017
Intermediate to advanced
434 pages
10h 14m
English
Content preview from SQL Server 2017 Administrator's Guide
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Always On Availability Groups
Always On Availability Groups were introduced with SQL Server 2012 to bring a database-level protection to the SQL Server. As with the Always On Failover Cluster, Availability Groups utilize the Windows Failover Cluster feature, but in this case, single SQL Server is not installed as a clustered instance but runs independently on several nodes. These nodes can be configured as Always On Availability Group nodes to host a database, which will be synchronized among the hosts. The replica can be either synchronous or asynchronous, so Always On Availability Groups are a good fit either as a solution for one data center or even distant data centers to keep your data safe. With new SQL Server versions, Always On Availability ...
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