On Jan 30, 2009, at 5:37 PM, Jan Lehnardt wrote:
Reduce functions should not grow its output larger
than log(n) where n is the number of input rows.
Can somebody update the wiki with that info, I thought
we have it? :)
On wiki, this may not be mentioned but discussed on mailing list
certainly many times.
Training one's procedural / OO brains to M/R/Rereduce with certain
restrictions is not easy.
Well, in my case reduce output is may not be strictly following log(n)
But if you mean per Key , it is reducing to single row from any number
of input rows for that key.
My problem seems to solve for now. with following change in M/R
functions,
// from forEach loop ...
values.forEach(function(r) {
....
});
// to simple for loops ...
for( var i in values ){
....
}
I don't know what is cost of each approach.
I wish if couchdb handle this things more gracefully with descriptive
errors.
Thanks for your answers.
