December 2017
Intermediate to advanced
434 pages
10h 14m
English
Content preview from SQL Server 2017 Administrator's Guide
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Basic Availability Groups
Basic Availability Groups are available in SQL Server 2016 and 2017 as a replacement for database mirroring, which has been deprecated since SQL Server 2012. Although mirroring is deprecated, it's still available and still being deployed in enterprise environments. Basic Availability Groups can offer you similar options to database mirroring.
A database can maintain a singe replica in synchronous or asynchronous commit mode. The secondary replica is inactive and not accessible to users until there is a failover. Failover just swaps the primary and secondary roles between servers, causing the secondary replica to become a primary replica. Basic Availability Groups can even span the environment, and you can configure ...
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