How scalable is replication?

I'm searching for information about replication scalability, has anyone deployed replication across hundreds or even thousands of instances? Can I realistically expect a single cluster to act as a replication point for a thousand replicas? The database I wish to replicate contains user informat

CouchDB 2: Unique Id from view with custom list function

I have a problem very similar to that described in this stack overflow: http://stackoverflow.com/questions/17017337/getting-unique-id-from-couchdb-view So I have written a variation of the list function suggested