Explain about Cognos TM1 feeders
The IBM Cognos TM1 calculation engine uses FEEDERS to help manage sparsity in cubes with SKIP CHECK enabled. There may be rule calculations for certain cubes, but they are extremely small or dense and may not need SKIP CHECK,More info go through Cognos TM1 Course . Feeders FEEDERS classify the cells in a cube which may contain a measured value based on a rule and ensure that these values are included in the calculation of the aggregation. SkipCheck SKIP CHECK is a keyword entered at the top of a rule file that makes the sparse data consolidation algorithm of TM1 possible. Usually, cubes using SKIP CHECK would require FEEDERS, another keyword entered in a rule file later on. For more on SKIP CHECK, please refer to section 2.3. Why FEEDERS for use? OLAP cubes can be very sparsely populated as it is very important to handle data within TM1 cubes. Examples of problems facing the construction of the TM1 Cubes are below. Example 1- Cube Sales Take a sales cube with the following dimensions