data warehouse inmon versus kimball 2
TRANSCRIPT
Data Warehouse Architecture Inmon or Kimball
DW Architecture
How do we choose ?
Bill Inmon
Ralph Kimball
Or some variant ?
Data Requirements
What do your users need ?
Data Requirements
What do your users need ?
Can the the various groups agree ?
Data Requirements
What do your users need ?
Can the the various groups agree ?
Do they have a time scale in mind ?
Data Requirements
What do your users need ?
Can the the various groups agree ?
Do they have a time scale in mind ?
Does your chief information officer have a time scale and budget set ?
These points will influence your approach
What does Bill Inmon say ?
One large integrated warehouse schema
What does Bill Inmon say ?
One large integrated warehouse schema
Longer to deliver and more expensive
What does Bill Inmon say ?
One large integrated warehouse schema
Longer to deliver and more expensive
No big bang, iterative approach
What does Bill Inmon say ?
One large integrated warehouse schema
Longer to deliver and more expensive
No big bang, iterative approach
Top down approach based upon organisation
What does Bill Inmon say ?
One large integrated warehouse schema
Longer to deliver and more expensive
No big bang, iterative approach
Top down approach based upon organisation
Could feed departmental data marts
What does Bill Inmon say ?
One large integrated warehouse schema
Longer to deliver and more expensive
No big bang, iterative approach
Top down approach based upon organisation
Could feed departmental data marts
More complex
What does Ralph Kimball say ?
Based on data marts, small subject based schemas
What does Ralph Kimball say ?
Based on data marts, small subject based schemas
Based on what user communities want
What does Ralph Kimball say ?
Based on data marts, small subject based schemas
Based on what user communities want
Quicker to deliver
What does Ralph Kimball say ?
Based on data marts, small subject based schemas
Based on what user communities want
Quicker to deliver
Later combine datamarts into warehouse
What does Ralph Kimball say ?
Based on data marts, small subject based schemas
Based on what user communities want
Quicker to deliver
Later combine datamarts into warehouse
Dimensional modelling
What does Ralph Kimball say ?
Based on data marts, small subject based schemas
Based on what user communities want
Quicker to deliver
Later combine datamarts into warehouse
Dimensional modelling
Based upon star schema's
What does Ralph Kimball say ?
Kimball data bus
move data to staging and clean
then populate data marts from staging
must have conformed dimensions
What does Ralph Kimball say ?
Kimball data bus
move data to staging and clean
then populate data marts from staging
must have conformed dimensions
Approach
select business process
determine the granularity
choose dimensions
identify facts
Ralph Kimball versus Bill Inmon Comparison
User Involvement
Keep your users informed
Make them a part of the process
Under stand their needs
Consider setting up user forums
Consider having power users
Consider sending out news letters and updates
Your project could fail if the users drift away !
Periodically ask the users, does the solution meet your needs ?
Want to know more ?
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Please check our web site below
Please feel free to ask any question that you might have
Semtech Solutions Ltd
www.semtech-solutions.co.nz
Email [email protected]
KimballInmon
NeedImmediateLonger time scale
DriveBusiness areasEnterprise
BudgetSmaller budgetLarger budget
RequirementsVolatileMore stable and growing
Customer User baseCorporate
SourcesStableChangeable
Startup costLowerHigher
ProjectsSame cost as start upCheaper than start up
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