PG2 Cognos TM1: An Introduction to Design, Maintenance and Performance Tuning

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9/2/09

Cognos® TM1- An Introduction: Design, Maintenance and Performance Tuning Webinar September 10th, 2009

Sanjeev Data Consultant for PerformanceG2

ClicktoeditMastersub1tlestyle

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Call us: 877.742.4276

Email Us: training@performanceg2.com

Visit our Web site: performanceg2.com

Watch our Cognos videos at: youtube.com/user/performanceg2

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9/2/09

IBM Cognos TM1 - Overview September 10th, 2009

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Session Objectives

Understanding TM1 – Overview

Design - Demo 1

TM1 Implementation Methodology – Project Management

Advanced Users – Demo 2

Maintenance & Performance Tuning

Integration with Cognos 8 – Demo 3

Best Practice

Q&A

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What is Table Manager (TM) 1?

High Performance OLAP Engine suited for Planning, Budgeting, Forecasting and Data Analysis

Designed for “Write-back” capabilities –> “What – if” scenario modeling

64 bit, In-memory (RAM) multidimensional server

Delivers “On-Demand” , Real-Time results in highly volatile (constantly changing) environments

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TM1 Components

TM 1 Server TM1 Perspectives Excel add-on TM1 Architect Turbo Integrator (TI)

TM1 Excel TM1 Web TM1 Executive Viewer

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Design - Demo 1

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Implementation Methodology – 5 phase process

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PHASE 1: Analysis

Goal Definition

Role Enumeration

Requirement Gathering

Infrastructure Assessment

Risk Assessment

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PHASE 2a: Model Definition

Cube Factoring

Dimension Factoring

Schema Capture

Business Rules

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PHASE 2b: Metadata Definition

Sources

Granularity

Hierarchies

Attributes

Naming Standards

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PHASE 2c: Metadata Definition/User Interface

Measures – Dimensions and Elements

Version Handling

Role-based Optimization

Define Default Views

Define Security Model

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PHASE 3: Construction

Create Objects

Initialize Data & Metadata

Create Business Logic

Build UI

Implement Security Model

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PHASE 4: Deployment

Technology Install

Verify Correctness of Dimension Hierarchies and Rules

Validation and User Acceptance Testing (UAT)

User Training (model-specific)

Support Training (model – specific)

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PHASE 5: Administration

Backup Plan

System Documentation

User Documentation

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Advanced Users - Demo 2

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TM1 – Performance Tuning

Area Technique

Server Server Memory • StarGate Views (SGV) • }CubeProperties Control Cube • Tuning RAM

Database • ReadersBypassWriters (tm1s.cfg) • Locking • Batch Updates • TI Functions

Spreadsheet Worksheet Functions

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Performance Tuning – StarGate Views

Calculated & Stored subsections of a TM1 Cube

Contains only data for a defined section of the cube

Are effectively “sub-cubes” created in server memory

Smaller than entire cube – Requires less server memory

Allows quicker Access to Cube Data

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Performance Tuning – StarGate Views

Allows any slice worksheets containing a VIEW function to remain functional but the function does not generate SGV

Allows TM1 to retrieve a calculated value from a SGV stored in memory

Faster retrieval time improves performance

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Performance Tuning – }CubeProperties Control Cube

View Maximum Memory (VMM)

View Minimum Time (VMT)

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Performance Tuning – }CubeProperties Control Cube

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Performance Tuning – Tuning RAM

Modify the boot.ini file (to the correct partition, if available)

Add “/3GB” switch to the end of the last line of boot.ini

Reboot the physical server on which the TM1 server runs

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Performance Tuning – Database Techniques

ReadersBypassWriters (tm1s.cfg) –> ReadersBypassWriters=T

Locking -> Locks read/write during TI process executions

Batch Updates -> Holding on to multiple changes and executing them in a batch process all at once

TI Functions-> LockOff -> Turns off server locking BatchUpdateStart -> Enables Batch Updates (Lock off) LockOn ->Restores Server Locking BatchUpdateFinish -> Server exists Batch Update mode

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Performance Tuning – Worksheet Functions

DBR – Function is executed and resolved before all other DB Functions

DBRW – Similar to DBR Function, but reduces Network traffic and may improve performance on Wide Area Networks

ELCOMP – Similar to DBR Function in that it retrieves a value from a specified TM1 cube but it also results in a round trip between the Server and Excel

Workbook_Open Event – A built-in workbook even that runs its macro code each time you manually open the workbook.

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Integration with Cognos 8 – Demo 3

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Best Practices

TM1 words must contain no less than 2 and no more than 256 dimensions

Many TM1 functions reference the element index values. Changing the order of elements in a dimension can return new and possibly unexpected values for any functions that reference the involved elements (show formula and less than 2 and no more than 256 example)

Rule override consolidations – must be a member of ADMIN group to write/edit rules

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Best Practices (con’t)

Rules take precedence over consolidations within dimensions

Del bib file from data directory folder when you are using another text editor for rules as this will cause discrepancies

Consolidations defined in dimensions are calculate much more quickly than rules-derived values, especially in very large, sparse cubes

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Q&A Session

training@performanceg2.com

Connect with us

Call us: 877.742.4276

Email Us: training@performanceg2.com

Visit our Web site: performanceg2.com

Watch our Cognos videos at: youtube.com/user/performanceg2

Follow us: twitter.com/performanceg2

Read our blog: performanceg2.com/blog/

Upcoming Events: performanceg2.com/events/

9/2/09

Thank your for attending our Webinar!

training@performanceg2.com