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Cognos 8 BI Architecture

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About the Author

Cognos Certified Professional having 3+ years of experience in CognosCredential

Information:

COGNOS/PPT/0807/1.0Version and

Date:

Mani Sathiya Samuel, Jayaprakash Santhosh (112888)Created By:

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Icons Used

Questions

Contacts

Reference

Demonstration

Hands onExercise

Coding

StandardsTest Your

Understanding

Tools

A Welcome

Break

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Cognos 8 BI Architecture: Overview

Introduction:This chapter exposes you to the internal architecture of Cognos 8

Business Intelligence (BI). Also, it explains the various components of

Cognos and how they communicate with each other.

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Cognos 8 BI Architecture: Objective

Objective:

After completing this chapter, you will be able to:

List the components of Cognos 8 and the tier they belong to

List the Web based User Interfaces (UI) which will be used by the

developer

Define Cognos 8 BI

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Cognos 8 BI Introduction

Cognos 8 BI is a enterprise wide BI solution. It helps in operational reporting, analytic reporting, adhoc

reporting, scorecarding, and event notification.

It is a web based solution. Both development and enduser

viewing can happen on web.

It supports both Relational Online Analytical Processing

(ROLAP) and Multidimensional Online Analytical Processing

(MOLAP )datasources.

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Cognos 8 Architecture

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Cognos 8 BI

Cognos 8 has a multitiered architecture. It can be separated into three tiers

namely: Web Server, Application Server, and Data Server.

Cognos 8 BI has both Windows based and Web based interfaces. These interfaces

sit on top of all the tiers.

The following are the Web based UI for COGNOS:

Cognos Connection

Query Studio

Report Studio

Analysis Studio

Event Studio

Metrics Studio

The following are the Windows based UI for COGNOS:

Framework Manager

Metrics Designer

Transformer

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User Interface

Cognos connection:

It is a Web portal and a single point of access for data and all other

Cognos products. To simply say it is the HOME PAGE for Cognos Web

based Interfaces.

Query studio:

Query studio is an adhoc reporting tool that lets users with little or no

training quickly design, create, and save reports.

Report studio:

This is a professional report development tool, where the users can

create, edit, and distribute reports. This is the most often used Interface.

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User Interface (Contd.)

Analysis Studio: Analysis Studio helps in viewing both ROLAP and MOLAP data sources.

It gives the ability to user to analyze the data in a better way.

Event Studio:

Helps in scheduling reports automatically

Also, helps in raising triggers when any value goes down a permissible

limit. For example for a Stock Manager, if the inventory value falls below

very much, an automated email has to be sent highlighting the fact.

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User Interface (Contd.)

Metrics Studio:

This interface helps the Senior Management of a company to monitor

the Key Performance Indicators (KPI) of the company as a whole.

It provides Dashboarding and Scorecarding capabilities.

Framework Manager:

This Windows based interface helps in building the Metadata layer ofthe Physical data.

It is this Metadata, which will be exposed to the Report author for

building reports.

Transformer:

This Interface actually helps in designing and developing the multidimensional cubes.

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Tier 1: Web Tier

The Web tier contains one more Cognos gateway residing on

WebServers.

When a Cognos 8 gateway receives a request, it:

Encrypts passwords to ensure security

Extracts information needed to submit the request to a Cognos 8 server

Attaches environment variables for the Web server

Adds a default namespace to the request to ensure that the server

authenticates the user in the correct namespace

Passes requests to a Cognos 8 dispatcher for processing

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Tier 2: Application Tier

This tier contains one or more Cognos servers.

The main Application Server component is Dispatcher,

Content Manager, and services like report service, job service,

log service, presentation service, and so on, managed by

Dispatcher. A dispatcher starts all Cognos 8 Services Configured and

enabled on a computer and routes requests to appropriate

services.

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Tier 2: Application Tier (Contd.)

A Cognos server has the following services:

Presentation service:

Handles requests from Cognos Connection, Query Studio, and Event Studio.

This takes care of rendering the report.

Report service:

The report service handles interactive requests to run reports and provides

output for a user.

Batch report service:

The batch report service handles background requests to run reports.

Job service:

The job service runs jobs by signaling the monitoring service to run job

steps in the background.

Monitoring Service: The monitoring service assigns a target service to handle a scheduled task.

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Tier 2: Application Tier (Contd.)

Log Service:

The log service manages all logs generated by the dispatcher and other services. Content Manager Service:

The content manager service performs object manipulation functions in the content

store such as add, query, update, delete, move, and copy.

Metrics Manager Service:

Metrics manager service provides the metrics studio interface for monitoring and

entering performance information.

Data Integration Service:

Data integration service controls the loading of metrics data and the calculation of

metrics status for scorecarding in metrics studio.

Content Manager:

Content Manager is the Cognos 8 service that manages the storage of customer

application data including security, configuration data, models, metrics, report

specifications, and report output. Content Manager is needed to publish models, retrieve, or store report

specifications, manage scheduling information, and manage the Cognos namespace.

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Tier 3: Database Tier

This tier consists of content store database, application

database, and metrics store:

Content store:

This is a relational database where all the data needed for Cognos 8 to

operate is stored.

Application database:

This is the actual business data on which Cognos 8 do the reporting.

Metrics store:

This is a relational database that contents for metrics packages. It also

contains metrics studio settings such as User Preferences.

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Questions from participants

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Test Your Understanding

1. What is the name of the interface where you can schedule

reports?2. Which of the following is a windows based interface?

a. Transformer

b. Metrics Studio

c. Event Studio

d. Analysis Studio3. List all the services of Cognos server.

4. The Content Manager is available ina. Tier 1

b. Tier 2

c. Tier 3

5. What is the functionality of a dispatcher?

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Cognos 8 BI Architecture: Summary

Cognos 8 BI is a complete Enterprise reporting solution.

The architecture is three tiered: Web, Application, and

Database.

The Developer and Business user Interfaces of Cognos are

both Web based and Windows based.

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Cognos 8 BI Architecture: Source

Cognos 8 BI Architecture and Planning (PDF document from

Cognos)

Disclaimer: Parts of the content of this course is based on the materials available from the Web sites and books

listed above. The materials that can be accessed from linked sites are not maintained by Cognizant Academy andwe are not responsible for the contents thereof. All trademarks, service marks, and trade names in this course are

the marks of the respective owner(s).

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You have successfully completed

Cognos 8 BI Architecture