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James Serra's Blog

James is currently a Senior Business Intelligence Architect/Developer and has over 20 years of IT experience. James started his career as a software developer, then became a DBA 12 years ago, and for the last five years he has been working extensively with Business Intelligence using the SQL Server BI stack (SSAS, SSRS, and SSIS). James has been at times a permanent employee, consultant, contractor, and owner of his own business. All these experiences along with continuous learning has helped James to develop many successful data warehouse and BI projects. James has earned the MCITP Business Developer 2008, MCITP Database Administrator 2008, and MCITP Database Developer 2008, and has a Bachelor of Science degree in Computer Engineering. His blog is at .

SQL Server 2014: AlwaysOn

AlwaysOn was introduced in SQL Server 2012, and there are some enhancements in SQL Server 2014:

  • Now support up to 8 secondary replicas that remain available for reads at all times, even in the presence of network failures.  Failover Cluster Instances now support Windows Cluster Shared Volumes, improving the utilization of shared storage and increasing failover resiliency.  Finally, various supportability enhancements make AlwaysOn easier to use
  • More secondaries for AlwaysOn Availability Groups: Increased from 4 secondaries to 8
  • Improved reliability for AlwaysOn Availability Group secondaries: The secondaries will now stay online if the primary goes offline
  • Can use Azure VMs as AlwaysOn Availability Group replicas:  When adding a replica you can specify an Azure VM

More info:

AlwaysOn in SQL Server 2014 CTP1

(Almost) Everything You Need to Know About the Next Version of SQL Server

Changes to SQL Server 2014 Always On Availability Groups

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