When should a DSO be used?

Hi surya,
1.Mainly ODS is used to store detailed level of data.
2. Getting teh data overwrtten for key fiedls instead of appending.
3. Delta functionality because of the Change log table.
4.All Datasources in ECC will not support for Delta. In such scenarios will go for DSO before cube, as DSO has Overwrite functionality.
If datasource does not support Delta, we can do full update to DSO and from there we can do Delta Update to Cube. We can maintain change log of each record in DSO,as it has chanege log table.
Here is the detail of Type of DSO in BI,
DataStore object types:
Standard DataStore object
Data provided using a data transfer process
SID values can be generated
Data records with the same key are aggregated during activation
Data is available for reporting after activation
Write-optimized DataStore object
Data provided using a data transfer process
SID values cannot be generated
Records with the same key are not aggregated
Data is available for reporting immediately after it is loaded
DataStore object for direct update
Data provided using APIs
SIDs cannot be generated
Records with the same key are not aggregated
And you can find more information / examples on this topic at:
http://help.sap.com/saphelp_nw04s/helpdata/en/F9/45503C242B4A67E10000000A114084/content.htm

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