Interested to Buy Any Domain ? << Click Here >> for more details...
how many datamarts we will use in real time project and when
will use the datamart?pls send the replay early
- 2 Answers
- 9759 Views
- Tech Mahindra, I also Faced
- E-Mail Answers
Answer Posted / madhu tallapaneni
For example: dB every branch have each mgr
Manager
Reliance comm.
Reliance Group : manager Top Level mgr(TLM)
Reliance power details of below
sales
Manager customer
Reliance Fresh TLM needs employee
period
` order
Input
Explanation of above example: Reliance group with some there branches and every branch have one manager. And for all this manager one Top level manager (TLM) will be there. And TLM needs the details of list shown above for analyze.
Bottom level
For above example how ETL process is done shown below RC-mgr
reliance fresh ERP
mini WH/ Data mart DWH independent Data Mart Dependent Data Mart Reliance Fresh(taking one from group directly)
Dependent Data Mart: means the ETL process takes all manager information or dB and keep in the Warehouse. By that the data transmission between warehouse and data mart where depends upon by each other. Here Data mart is also called as ‘Bottom level’/ ‘mini WH’ as shown in blue color in above figure i.e., the data of individual manager (like RF, RC, RP and so on). Hence the data mart depends up on the WH is called dependent data mart.
Independent Data Mart: only one or individual manager i.e., data mart were directly access the ETL process with out any help of Warehouse. That’s why its called independent data mart.
6.1 Two level approaches:
For the both approaches two layers architecture will apply.
1. Top-Bottom level approach, and
2. Bottom- Top level approach.
6.1. Top – Bottom level approach:
The level start from top means as per example Reliance group to their individual managers their ETL process from their to Data Warehouse (top level) and from their to all separate data marts (bottom level).
R Comm. Data Mart
R Power Data Mart
Reliance Group
Warehouse
R Fresh Data Mart
Top level Bottom level
Layer I Layer II
Top – Bottom level approach
In the above the top – bottom level is defined, and this approach is invented by W. H. Inner.
Here, warehouse is top level and all data mart are bottom level as shown in the above figure.
6.2. Bottom – top level approach:
Means from here the ETL process takes directly from data mart (DM) and the data put in the warehouse for reference purpose or storing the DM in the Data WareHouse (DWH).
R comm.
DM
R power
DM DWH
Reliance Group
R fresh DM
Layer I Layer II Bottom level Top level
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
what should be ensure to run the sequence job so that if its get aborted in 10th job before 9job should get succeeded?
What are the repository tables in datastage?
What can we do with datastage director?
Source has 2 columns: USA,NewYork INDIA,MUMBAI INDIA,DELHI UDS,CHICAGO INDIA,PUNE i want data in target like below: INDIA,MUMBAI1 INDIA,DELHI2 INDIA,PUNE3 USA,NEWYORK1 USA,CHICAGO2
How to reverse the string using unix?
Have you used Unstructured data?
Differentiate between hash file and sequential file?
What is datastage?
If you want to use a same piece of code in different jobs, how will you achieve this?
What are transforms and what is the differenece between routines and transforms?
WAT TYPE OF PL/SQL QUERRYS USED IN DATASTAGE
How many types of views are there in a datastage director?
Which is the best institute in Hyderabad to learn OBIEE and DataStage?Please tell me faculty name also
What are routines in datastage?
i WANTED TO USE THE RANGE LOOKUP SCENARIO IN DATASTAGE 7.5.2 SRVER JOB.i HAVE A DATE FIELD IN SOURCE AND I SHOULD MATCH IT WITH A FIELD IN LOOKUP FILE.BUT,THE FIELDS SHOULD MATCH EVEN THOUGH THERE IS SOME RANGE.CAN SOMEONE TELL ME HOW CAN I DO THAT. THANKS
