SQL Server Denali Contained DatabasesDean Vitner
The problem Logically, a database is a basic, self-contained unit But... A database depends a lot on the environment Different settings on different instances Collations Linked servers Logins This makes it hard to move a database from one instanceto another
DEMO 1
The solution Contained database All important settings are contained inside the database Everything travells along with the database when wemove it
Is it contagious?
DEMO 2
Item User Data (default) Temp Data (default) Metadata Temporary Metadata Variables Goto Labels Cursor Names
Non-Contained Database DATABASE_DEFAULT TempDB Collation DATABASE_DEFAULT TempDB Collation Instance Collation Instance Collation Instance Collation
Contained Database DATABASE_DEFAULT DATABASE_DEFAULT CATALOG_DEFAULT CATALOG_DEFAULT CATALOG_DEFAULT CATALOG_DEFAULT CATALOG_DEFAULT
Application vs Management model Application model Objects contained inside the database Metadata (sys.tables etc) Users with passwords User tables Management model Objects outside the database Instance-level functions Divided by application boundary
Application boundary Divides application and management model The idea was to put everything that logically belongs toapplication model into a database
Everything else is part of management model Features Outside of the Application Model:http://msdn.microsoft.com/en-us/library/ff929118(v=SQL.110).aspx
Application model In SQL Server code name Denali: Users without login #temp object collations are always database_default Catalog collation is always: Latin1_General_100_CI_AS_WS_KS PARTIAL containment only
DEMO 3 & 4
Loginless users Logged in to the instance as guests Must have default database specified in connection string Both for SQL and Windows logins Precede same-name logins CREATE USER xxx WITH PASSWORD = 123QWERTY sp_migrate_user_to_contained
Is my database contain-able? sys.dm_db_uncontained_entities dynamic managementview
database_uncontained_usage Xevent User with login Dynamic SQL xp_cmdshell sp_send_db_mail ...
DEMO 5 & 6
What is it good for? Failover in mirroring or log shipping scenarios Consolidation Testing Deploying applications All editions No performance hit
Section headline
Thank you for your attention.
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