Windows Server 2012 R2: a first look

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Hekaton is an in-memory database for SQL Server

Source:  Microsoft

SQL Server 14 introduces a new database engine optimised for in-memory data, code-named Hekaton. This does not replace the existing engine, but is an option for specified tables that can exist only in memory, with remarkable speed improvements, faster by a factor of 20 or more.

High Availability in SQL Server now supports Cluster Shared Volumes, and the maximum number of secondary replicas has increased from four to eight.

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