Could u explain the business process

Question

hi guru's
could u explain the business process scenario ,  how it works in bw . could u explain detailed, suppose to take CLINT NOKIA MOBILE AND MY EMPLOYER SOME  XX COMPANY,
CAN U EXPLAIN DETAILED?

Answer 1

Hi Prabha,
Aggregate Definition :
An aggregate is a materialized, aggregated view of the data in an InfoCube. In an aggregate, the dataset of an InfoCube is saved redundantly and persistently in a consolidated form on the database.
Use
Aggregates allow quick access to InfoCube data during reporting. Similar to database indexes, they serve to improve performance.
An aggregate is made up of the characteristics and navigation attributes that belong to an InfoCube. Characteristics that are not used in the aggregate are compressed.
Each component of an aggregate has to be assigned to a selection type. A selection type indicates the degree of detail to which the data in the underlying InfoCube is aggregated. You can choose one of the following selection types:
All characteristic values ("*"): The data is grouped by all values of the
characteristic or navigation attributes .
Hierarchy level (“H”): The data is grouped by the hierarchy level node. You can
also store values on the hierarchy levels of an external hierarchy .
Fixed value (‘F’): The data is filtered by a single value .
For each InfoCube, you can set whether the aggregates of the InfoCube are compressed automatically when it is filled with data or after the roll up of data packages (requests).
1. You are in the Data Warehousing Workbench in the Modeling functional
area. In the InfoProvider tree, navigate to the required InfoCube.
2. In the context menu of the InfoCube, choose Manage.
3. In the lower part of the screen, select the Roll Up tab page.
4. Under the Aggregates group header, set the corresponding indicator in
the Compress After Roll Up field.
Standard Aggregation : This means how the key figure is going to be summarized normally for a specific set of characteristics .
Eg : Quantity across all the purchase items for a purchase Order
Exceptional Aggregation : You define how the aggregation should happen basing on a particular characteristic ( Usually time characteristic ) .
Eg : head count ( No of Employees ) in a organisation ..--> this should not be summarized on a daily basis..instead this should give a final value at the end of the month .
Aggregation is basically for keyfigures .
take a look at this doc, you will find all your answer:
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/cbd2d390-0201-0010-8eab-a8a9269a23c2
Refer this for aggregates
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/3f66ba90-0201-0010-ac8d-b61d8fd9abe9
Aggregates versus Physical Cube Splits?
http://help.sap.com/saphelp_bw33/helpdata/en/c5/40813b680c250fe10000000a114084/frameset.htm
http://help.sap.com/saphelp_bw33/helpdata/en/ca/aa6437e7a4080ee10000009b38f842/frameset.htm
Question1: how we will see the based on aggreagate what querys are running
I think "aggreegate maintance screen ---proposal -
query proposal" i am right ,if it is worng pls correct me?
Answer 1:
There are two tools that are used to analyze which aggregate is suitable for which navigation step.
You optimize the start screen of a query with the query Monitor (transaction RSRT) if you execute the function Execute + Debug.
With the trace tool (transaction RSRTRACE) you can draw several navigation steps, and process them again using the function DB Debugging (exact path: Transaction RSRTRACE > Goto > User Logs or All Logs > double-click on the log you want > DB Debugging).
Refer The OSS note 99010
Question 2: When i am creating a aggregate what charteristics we choose i mean based on report/some thing else?
Answer 2:
By refering the Statistical data and comparing the Proposed Aggregates we can create the aggregates.
The above RSRT and RSTRACE will be more useful tools to plan an Aggregate.
Refer
http://help.sap.com/saphelp_nw2004s/helpdata/en/80/1a67abe07211d2acb80000e829fbfe/content.htm
and other option is:
Refer page 36 in this PDF
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/3f66ba90-0201-0010-ac8d-b61d8fd9abe9
Question 3:
When we are crearting a agreegate one message box will apper in that we one option "proposed aggregate" wht does it mean how it work??
Answer 3:
Based on the Statistical data and query-aggregate data system will propose the new aggregate definitions.
Question 4:
under what senario we apply for query performance aggregates??
Answer 4:
Refer this PDF
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/3f66ba90-0201-0010-ac8d-b61d8fd9abe9
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/cbd2d390-0201-0010-8eab-a8a9269a23c2
For more info refer:
http://help.sap.com/saphelp_nw04/helpdata/EN/7d/eb683cc5e8ca68e10000000a114084/frameset.htm
https://www.sdn.sap.com/sdn/collaboration.sdn?contenttype=url&content=https%3A//forums.sdn.sap.com/thread.jspa%3FforumID%3D133%26threadID%3D51253%26messageID%3D526450%23526450
You have a aggregate document by SAP in http://service.sap.com/bi -> BI Infoindex which would answer all your questions.
http://help.sap.com/saphelp_nw04/helpdata/en/7d/eb683cc5e8ca68e10000000a114084/content.htm
It would be very useful for you to go through the performance tuning with aggregates documents here:
Business Intelligence Performance Tuning [original link is broken]
Look at the thread below for index:
Indexes, Aggregates , partitioning of cube
Hope this helps.
Regards,
Ravikanth