Tuesday, March 15, 2011

Control Flow vs Data Flow

Control Flow
Data Flow
1st step for creating package
2nd step for creating package, it will be part of control flow
Made up of
Containers and tasks connected with precedence constraints
Source, transformation and destinations
It is about data preparation and managing the process
It is about ETL activities
Smallest unit
Data movement
It does not move the data from one task to another task
It moves the data from source to destination
Task1 has to be completed before Task2 begins
Multiple components can be processed at the same time
Only 1 control flow is available
There can be multiple data flow tasks inside control flow
Error output
Explicit Error output is not there but it can be achieved by editing precedence constraint
Error output is available in source/transformation/destination

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