MOLAP vs ROLAP-Which is better when new data being added continually?


 

currently run database millions of records, , data continually being added. reports have created database generated slowly, , believe database has been optimised as possible.

 

in reading around believe generating cube possible solution, after reading advantages/disadvantages of cubes listed at:

 

http://businessintelligence.ittoolbox.com/documents/popular-q-and-a/advantagesdisadvantages-of-molap-rolap-and-holap-2934 

 

and

 

http://forums.microsoft.com/msdn/showpost.aspx?postid=2444151&siteid=1

 

i not sure best our scenario. questions are:

 

1. can achieve increase in performance using cube?

 

2. given data isn't static (new data added daily) have regenerate cube if use molap or use have use rolap , suffer poor performance?

 

3. able reuse existing reports against cube or have create them again?

 

4. users requesting ad-hoc reporting. using cube offer advantages?

hi! here answers!

 

1. yes can depends on questions being made to molap-cube. leaf level questions not faster than present solution questions hit top levels in dimensions can use aggregations being built in cube.

2. can use molap , use different partitions add or remove data in cube. partitions part of enterprise edition of ssas2005.

3. since ssas2005 cube use mdx have build new reports. can use reporting services or excel 2007.

4. users can run ad-hoc queries excel 2007, excel 2003(with reduced functionality), proclarity professional 6.3 or anyt other third party tool on market.

 

hth

thomas ivarsson



SQL Server  >  SQL Server Analysis Services



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