batch update SharePoint data

Question

Hi,

I need to import user profile information to a sharepoint list. Also, the user profile information will be periodically updated to the list , therefore i think i should use a timer job to update the information.

Importing for the first time works without any issues. But can you suggest what can be the best way to update information. The update should take care of updating existing records in profile , mark as orphaned for the records that are deleted from user profile and add new records in user profile to the list.

Thanks