I have put up a draft design doc for SQOOP-1168. https://cwiki.apache.org/confluence/display/SQOOP/Incremental+and+Delta+Update+Design
Please provide any comments /feedback in the comments section. I will try my best to clarify and/or incorporate the feedback. I have tried to answer all the high level questions posed in https://cwiki.apache.org/confluence/display/SQOOP/How-to+design+wiki Best, *./Vee*
