A number of videos that might help you get started - http://www.youtube.com/datagaps
Support Portal:
http://www.datagaps.freshdesk.com
ETL Validator
Performance Benchmark - http://datagaps.freshdesk.com/support/solutions/articles/1000189415-etl-validator-performance-benchmark
Deployment Models - http://datagaps.freshdesk.com/support/solutions/articles/1000160538-etl-validator-deployment-models
Hardware Requirements - http://datagaps.freshdesk.com/support/solutions/articles/1000117629-hardware-requirements