Mailing-List: contact common-user-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: common-user@hadoop.apache.org
Received-SPF: pass (nike.apache.org: domain of qwertymaniac@gmail.com
 designates 209.85.161.48 as permitted sender)
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:in-reply-to:references:from:date:message-id:subject:to
         :content-type:content-transfer-encoding;
        b=tEGX2877rTUefUnSEDeHp75ilkIOaATeN23soS/4brMS+9lcAsnG+vZJ32YMyhaMnC
         phwU9qgN2t7QukAelnNBMCWsHnK4Gkf7rNgn1GwJ2rC4l+UOxc3T9yHk3TXZY8/bWjuG
         tIBwcXqAGa+Y5j1QptsItBAlUmQBZFnQm8aNE=
MIME-Version: 1.0
In-Reply-To: <1CF337FE-06DD-4FFC-AA36-4764E2B28AE3@keithwiley.com>
References: <20E4EF03-255E-4B1D-A6B7-DAF003FD4258@keithwiley.com>
 <AANLkTimbJOgXkVfefU8t27rSSig-O=cC0O-LoJWW=O_H@mail.gmail.com>
 <1CF337FE-06DD-4FFC-AA36-4764E2B28AE3@keithwiley.com>
From: Harsh J <qwertymaniac@gmail.com>
Date: Wed, 2 Feb 2011 09:28:40 +0530
Message-ID: <AANLkTik6s8cmN2MoeE-YkXY=yPa_P1+=6me3yoK8XWvh@mail.gmail.com>
Subject: Re: Streaming reporter counter update
To: common-user@hadoop.apache.org
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

Group is more of a meta-data thing. For instance, one may want all
FileSystem related counters under a single namespace (which would be a
Group, here).

On Wed, Feb 2, 2011 at 2:17 AM, Keith Wiley <kwiley@keithwiley.com> wrote:
> Ah, so count doesn't "set" the count, it increments it, meaning I shouldn=
't increment it each time. =A0That would result in some sort of strange exp=
onential counter. =A0I should just pass 1 every time. =A0I 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.
>
> Thanks.
>
> 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.
>>
>> Example:
>> 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 =A0 =A0 =A0 =A0 =A0 =A0 =A0 kwiley@keithwiley.com =A0 =A0 =A0=
 =A0 =A0 =A0 =A0 www.keithwiley.com
>
> "I used to be with it, but then they changed what it was. =A0Now, what I'=
m with
> isn't it, and what's it seems weird and scary to me."
> =A0-- Abe (Grandpa) Simpson
> _________________________________________________________________________=
_______
>
>
>
>


--=20
Harsh J
www.harshj.com