I mentioned this on the Aurelius Graphs mailing list, but Daniel Kuppitz and I put together a tutorial on how to do a data migration from Titan 0.5.x to Titan 1.0.0. You can find it here:
https://github.com/dkuppitz/openflights Even if you don't use Titan, ,you might find it interesting as it shows a bulk loading use case that might be helpful in a more general context. Enjoy! Stephen
