Hi,
Function declaration for reduce functions look like
function(keys, values, rereduce) {
}
My doubt is regarding the 'keys' parameter.
Can multiple keys be passed to single invocation of custom reduce function ?
In Hadoop world, only one key is passed to reduce function along with all
the values against the key.
>From what i have read on internet so far, it seems that multiple keys can
be sent to reduce function.
if this is the case, then against which key does the result of reduce
function be assigned to ?
Thanks,
Giridhar.
