Migrating a huge live drupal 6 site to drupal 7 Server I am having a drupal 6 based news site with almost 600 thousand nodes. We are currently building a new site on drupal7. 


What are the ways to migrate the content from old to new?  
What are the best practices?
What are the know issues? 
Can data be migrated in chunks?


I did alot of reading online, didn't find anything to give me confidence. Hopefully there will be people here who have hands on experience in this.
This topic is already well covered in the Drupal documentation.