Buckets and rebalancing
Having read the membase documentation I still have some doubts about the concepts of buckets, vbuckets and rebalancing.
1) Is a bucket the same thing as a vbucket, or does the bucket stand for an entire key space, subdivided into vbuckets?
2) Assuming the latter, how exactly does cloning and rebalancing reduce the load on a particular node? Is the cloned node made the master for a subset of vbuckets?
3) If so, does a mechanism exist to identify the most accessed vbuckets and divide them evenly between the original and the cloned node during rebalance?
Thanks in advance.