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Universe Design
How will you ensure that the universe designed is optimum?


  
Total Answers and Comments: 2 Last Update: April 14, 2009     Asked by: richaduggal84 
  
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 Best Rated Answer
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Submitted by: Rajnish_kaushal
 
Best way to make sure Universe Design is optimum is by following the best practices. couple of things which we can look into for optimisation

1. Connection parameters are set as per the underlying datbase system.
2. Joins in the universe structure. When i say joins we need to make sure that queries traverse minimum nuber of tables.
3. Check Objects and try to use as less SQL functions as possible. Try to get most of things as attributes in ETL or database itself.
4. Make sure derived tables are used as last resort.
5. Unneccesary objects are removed from universe before moving to QA/Production.
6. Make sure LOVs are only ticked for objects which may be or are used in reports. By default most of the time , every object has lovs. So we need to make sure we do not end up making universe bigger than it should be.
7. Make sure Date prompts are defined properly. Make sure LOVs used in Date Prompt do not have time stamping. I have seen this making lot of difference. Date Prompts sometime take time to refresh and this is only because LOV it is trying to show has time element. This leads to 100s of different combinations.


Regards

Rajnish

Above answer was rated as good by the following members:
pghate, vying
March 04, 2009 01:30:51   #1  
prashantpurohit2000 Member Since: November 2007   Contribution: 26    
RE: Universe Design
Some of the precautions you should always keep in mind: • Do not use automatic universe creation tool design your universe piece by piece and insert one table at a time also the joins and cardinalities should be added step by step. • Table structure and arrangement should be as per business logic. • No tables should be such that they are not joined to any other table. • No Joins should be such that they are not included in any context and each context should have proper name aligned to business. • Use aggregate awareness wherever possible or needed.
 
Is this answer useful? Yes | NoAnswer is useful 1   Answer is not useful 0Overall Rating: +1    
April 13, 2009 17:53:35   #2  
Rajnish_kaushal Member Since: April 2009   Contribution: 10    
RE: Universe Design
Best way to make sure Universe Design is optimum is by following the best practices. couple of things which we can look into for optimisation

1. Connection parameters are set as per the underlying datbase system.
2. Joins in the universe structure. When i say joins we need to make sure that queries traverse minimum nuber of tables.
3. Check Objects and try to use as less SQL functions as possible. Try to get most of things as attributes in ETL or database itself.
4. Make sure derived tables are used as last resort.
5. Unneccesary objects are removed from universe before moving to QA/Production.
6. Make sure LOVs are only ticked for objects which may be or are used in reports. By default most of the time every object has lovs. So we need to make sure we do not end up making universe bigger than it should be.
7. Make sure Date prompts are defined properly. Make sure LOVs used in Date Prompt do not have time stamping. I have seen this making lot of difference. Date Prompts sometime take time to refresh and this is only because LOV it is trying to show has time element. This leads to 100s of different combinations.


Regards

Rajnish
 
Is this answer useful? Yes | NoAnswer is useful 3   Answer is not useful 0Overall Rating: +3    

 Related Questions

Latest Answer : 1. Define Universe Parameters2. Insert Tables3. Insert Joins4. Detect Loops5. Resolve Loops6. Create Classes7. Create Objects8. Create Hierarchies9. Export the universe ...
Read Answers (7) | Asked by : bhargav
Latest Answer : Universe can be tested by using Integrity Check weather to find out we have any Loops created while giving joins to tables, and also we can check cardinalty ( 1- m , m-1 relationship ) and Divergency (like tables with out joins).Coming to Reports we can ...
Read Answers (5) | Asked by : sunny
How to break a Date field into Year, month, week,day?(For example: I have a field INVOICE_DATE. Now i want to break it as Year, month..... i.e. in time dimension.) DO i need to have some changes in Universe?
In the BO universe, how to link two universe, like i have one universe in sales.uni and another is marketing.uni
Read Answers (2) | Asked by : abid
Latest Answer :   ...
Read Answers (4) | Asked by : sunil
Latest Answer : classes, objects, connection& security information ...
Read Answers (2) | Asked by : sreetu
Latest Answer : No, not directly but you can link the universes to get it done. ...
Read Answers (7) | Asked by : Padma
filter reusable..condition not reusableConditions: these retrievals the data based on the condition (universe level)Filter: it brings the data and filter; performance will be slow (report level) 
Latest Answer : An added point here is that a condition is used to fetch selected data from the data source (data base) while the filter is used to fetch selected data from the data cube.Also, you apply a condition in DeskI using Edit data provider, while filter ...
Read Answers (3) | Asked by : sudheer
1. What is an Universe? 2. How many Universes did you create? 3. Tell me how many classes where there, and objects in each class? 4. What is Object qualification? 5. Tell me about a complicated object you have created? 6. What was the size of the database? Which server? 7. How many user were there? 8. What problems you have faced while creating an universe? tell me an incident and how you went about solving it? 9. Were any experts called from BO while you were on the project? 10. What was the Database?
Read Answers (2) | Asked by : Srinath
Hi all.Can you please tell me whether we can able to create a Universe for a text file. If yes, what is the ODBC Driver do we need to select.

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