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ETL Testing - Interview Questions
What is the difference between power mart and power center?
Power Mart  Power Center
It only processes small amounts of data and is considered good if the processing requirements are low.   It is considered good when the amount of data to be processed is high, as it processes bulk data in a short period of time.  
ERP sources are not supported.  ERP sources such as SAP, PeopleSoft, etc. are supported.  
Currently, it only supports local repositories.  Local and global repositories are supported. 
There are no specifications for turning a local repository into a global repository.   It is capable of converting local repositories into global ones.  
Session partitions are not supported.  To improve the performance of ETL transactions, it supports session partitioning. 
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