SQL Server High Availability Architectures 2012

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SQL 2012

http://technet.microsoft.com/en-us/library/ms143504.aspx
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/ee05954e-0934-4305-8936-b9226e231d06/log-shipping-vs-database-mirroring?forum=sqldatabasemirroring
Always On - Failover Cluster Instances
-Requires WSFC (Windows Server Failover Clustering)
-Requires shared storage
-Is featured in Standard Edition
Always On - Availabilty Groups
-Set up groups for different databases with different criteria
-Requires WSFC
-Does not require shared storage
- Not supported in Standard Edition
Mirroring
-Can support failover
-Sync or Async
-One primary to one secondary
-Deprecated - for removal in later editions
Log Shipping
- Shipping and application of transaction log backups
- Asynchronous
- Scheduled
- One primary to many secondaries
http://support.microsoft.com/kb/321247
http://blogs.technet.com/b/canitpro/archive/2012/02/08/the-sql-guy-post-15-best-practices-for-using-sql-server-service-accounts.aspx
Replication
- Primarily for shipping individual DB objects
- Will not replicate assemblies and users
- Three types - Transactional, Merge, Snapshot

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