MicroStrategy 7 Administrator Guide

A database instance stores the following information:
• Type of database represented by the database instance (such as Oracle,
Teradata, Tandem, and so on)
• Maximum number of connections allowed for the database instance
• Location for intermediate table storage
• Prioritization scheme to be used when submitting jobs to the database
• Database-specific optimizations called VLDB properties
• Database gateway support, used for distributed databases
• Default database connection
A database connection specifies all of the information necessary for
MicroStrategy Intelligence Server to connect to a database. This information
includes:
• The system DSN that points to the database
• ODBC options such as driver mode, maximum cancel attempt time, and
maximum query execution time
• Database connection caching options
• Default database login
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5XOHÃYou must include a database connection as part of a database instance
definition.
A database login contains the login ID and password used to access a database.
Database logins allow you to map different users to different database login
ID/password combinations.
5XOHÃYou must include a database login as part of a database connection
definition.
VLDB properties
VLDB properties allow MicroStrategy Intelligence Server to take advantage of
the unique optimizations that different databases offer. There are over fifty
settings that, depending on the database type, affect how MicroStrategy
Intelligence Server handles things like:
• Data type conversions
Databases and MicroStrategy Intelligence Server 13