Cognos TM1

IBM Cognos TM1 is enterprise planning software used to implement collaborative planning, budgeting and forecasting solutions, as well as analytical and reporting applications. Similar to Hyperion Essbase, TM1 is a multidimensional data store however it only supports data storage at the “leaf” level.

Having worked with Hyperion Planning solution, I decided to explore the Cognos TM1 offering. The latest version is 9.5 which came out February 9, 2010 and there has been some considerable improvements – the most visible being TM1 Contributor which is a web-based front end. Previously TM1 was basically managed through the Microsoft Excel interface and the TM1 Architect.

In the subsequent posts I will be taking a look at the Cognos TM1 version 9.5 offering starting with the installation.

The Basics: OLAP, MOLAP, ROLAP, HOLAP – Lot’s of letters but what do they mean?

As part of the ‘basic’ series, we now come to the world of OLAP and the various concepts, technologies and tools in it. In my previous post on OLTP and OLAP, we saw the difference (conceptually) between what comprises an OLTP system and what would be considered as an OLAP system.

Having understood the fundamental concept of OLAP, lets go down the rabbit hole and see what other wonders we find. To jumpstart the process I’ll throw at you the 3 acronyms you are bound to hear when OLAP pops up and that is MOLAP, ROLAP and HOLAP. They are the three stooges of OLAP.

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