-Re: Streaming reporter counter update
Keith Wiley 2011-02-01, 20:47
Ah, so count doesn't "set" the count, it increments it, meaning I shouldn't increment it each time. That would result in some sort of strange exponential counter. I should just pass 1 every time. I get it.
I'm still unclear on the distinction between the group and the individual counter, but I'll read up on that on my own.
On Feb 1, 2011, at 12:31 , Harsh J wrote:
> A 'group' is a set of counters (like 'Map-Reduce Framework' in default
> counters -> That's a group name). A 'counter' needs a name to signify
> what it is about.
> The increment is what the 'amount' signifies. Generally 1, but can be
> any amount you need to increment the current count by. All counters
> are of Long type. Floats are not acceptable AFAIK.
> reporter:counter:Aliens,Mars,1 would +1 the global counter
> [Aliens].Mars and reporter:counter:Aliens,Unknown,10 would +10 the
> global counter [Aliens].Unknown.
> Counters are aggregated together across all launched tasks, so you
> don't need to worry about aggregating them yourselves. Each Map/Reduce
> task needs only to count its own needed counters up from 0.
Keith Wiley [EMAIL PROTECTED] www.keithwiley.com
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