partitioning and bulk processing

[unixwhoopie]

I know Informatica 7.1.3 has bulk processing capability. When you create partitions in a session, do you also need to create partition on the actual Oracle source table or does the session take care of it? Also what about parallel processing in Informatica? How does it work? Does it have to be on the source table or target table?

Is there any limit to the number of partitions? If we have more partitions, does it improve the performance?

Thanks