2010/10/15 Wout Mertens <[email protected]>: > Just wanted to add that if you have a map function that emits (tag, 1) for > each tag and then a reduce function that's just _count, you will have > everything you need for painting a tag cloud. > > The view with group=true will list all tags exactly once, with their count. > CouchDB doesn't tell you how many rows are in the result so you'll have to > count them yourself. > > So you load that entire view in memory and you can draw the tags with their > relative sizes. > > Wout.
The example I gave is a rather simplified example. I'm working a data containing 25M+ docs with books, works and subjects. I need to find the list/count of works for each subject. I don't think it is practical to load the view into memory to compute the required result. Anand
