3 billion rows to load, how to make it go faster?

hi

we have a view that is going to load 3 billion rows. The task is working, but is not very fast (its been 2:18:00 hours and we are only at 226,790,000) so this is going to take a long time.

We are using oracle to oracle. what should we look at to make this perform better? we have 14 tables/view that are about this same size that we need to replicate.

thanks!