obiee repository basics

8/10/2019 OBIEE Repository Basics

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Repository Basics


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Oracle BI Server Architecture

Oracle BI Server architecture and relatedcomponents.


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Oracle BI Presentation Services

Provides the framework and interface for thepresentation

of business intelligence data to Web clients

Is a set of query clients that includes the followingcomponents:

Analysis Editor

Set of graphical tools that enable users to build,

view, andmodify analyses that provide analytic information

Dashboards

Display the results of analyses and other items


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Oracle BI Server

Is the core server behind Oracle BusinessIntelligence

Provides efficient processing to access physical data

sources and structure information intelligently:

Uses metadata to direct processing

Generates dynamic SQL to query data in the physicaldata

sources

Connects natively or through ODBC to a data source

Structures results to satisfy requests

Provides BI data to Oracle BI Presentation Services


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Data Sources

Contain the business data that users want toanalyze

Are accessed by Oracle BI Server

Can be in multiple formats, such as:

Relational databases

Online analytical processing (OLAP) databases

Flat files

Multidimensional data sources


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Oracle BI Repository

Stores the metadata used by Oracle BI Server

Is accessed and configured by using the Oracle BI

Administration Tool, which you use to:

Import metadata from databases and other datasources

Simplify and reorganize the metadata into businessmodels

Structure the business model for presentation tousers who

request information


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Orcale BI Adiministration Tool

Exposes the Oracle BI repository as threeseparate panes calledlayers:

Physical

Business Model and Mapping (BMM)

Presentation


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Physical Layer

Contains objects representing the physicaldata sources to which Oracle BI Serversubmits queries

May contain multiple data sources Is typically the first layer built in the repository


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Objects in Physical Layer

Are objects in the Physical layer, such asconnection pools, folders, tables, columns, andkeys

Expand a database object to display the objects

that it contains:


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Business Model and Mapping Layer

Is where physical schemas are simplified andreorganized to form the basis of the usersview of the data


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Objects in the Business Modeland Mapping Layer

The Business Model and Mapping layercontains business model objects.


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Business Model Mappings

Business Model and Mapping layer objects map to sourcedata objects in the Physical layer.

Mappings are typically not one-to-one:

Business models may map to multiple data sources.

Logical tables may map to multiple physical tables.

Logical columns may map to multiple physical columns.


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Measures

Are the facts that a business uses to evaluateits performance

Can be calculations that define measurable

quantities Are created on logical columns in the fact table

Typically have a defined aggregation rule


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Presentation Layer

Contains presentation objects that provide acustomized view of a business model to users

Simplifies and organizes the business modelto make it easy for users to understand and

query

Exposes only the data that is meaningful to theusers


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Presentation Layer Mappings

Presentation layer objects map to objects inthe Business Model and Mapping layer.


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Repository Directory

By default, repositories are stored in therepository subdirectory where Oracle BIsoftware is installed:

ORACLE_INSTANCE\bifoundation\ OracleBIServerComponent\

bi_instance_name_obisn\repository


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Repository Modes

Repository files can be opened for editing in offline modeor online mode.

Offline mode

Repository is not loaded into Oracle BI Server

memory. Online mode

Repository is loaded into Oracle BI Server memory.

Administrators can perform tasks that are not available in

offline mode: Manage scheduled jobs.

Manage user sessions.

Manage the query cache.

Manage clustered servers.


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Publishing a Repository

Use Fusion Middleware Control to publish arepository and make it available for queries.

Using FMW Control to


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Using FMW Control toManage OBI Components


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Reloading Server Metadata

Click the Reload Server Metadata link torefresh the view of Oracle BI metadata.


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Sample Analysis Processing

1. A user views a dashboard or submits an analysis.2. Oracle BI Presentation Services makes a request to

Oracle BI Server to retrieve the requested data.

3. Using the repository file, Oracle BI Server optimizes

functions to request the data from the data sources.

4. Oracle BI Server receives the data from the datasources and processes as necessary.

5. Oracle BI Server passes the data to Oracle BIPresentation Services.

6. Oracle BI Presentation Services formats the dataand sends it to the query client.

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