How I can access this url?

Sorry for the incorrect link posting. It looks like we haven't opened that page up to the public yet. The bulk of the material that explains rebalancing of nodes however was in the link I post to the Membase whitepaper. Take a look at that and feel free to post any further questions you have about rebalancing here.

Here's the link again for the whitepaper.
http://www.couchbase.com/sites/default/files/uploads/all/whitepapers/Mem...