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From: Harsh J <qwertymaniac@gmail.com>
Date: Thu, 25 Nov 2010 14:10:20 +0530
Message-ID: <AANLkTikiErDvtp6xU=ROh4Lxk5wi-AWXZkqLhr8SHUhZ@mail.gmail.com>
Subject: Re: using pipe in the command executed by slaves.sh
To: mapreduce-dev@hadoop.apache.org
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Hi,

On Thu, Nov 25, 2010 at 11:49 AM, Ted Yu <yuzhihong@gmail.com> wrote:
> Hi,
> We use cdh3b2
> I want to get per-tasktracker statictics, such as the count of map/reduce
> tasks on each node.
> The following returns total:
> slaves.sh =A0/usr/java/default/bin/jps | /bin/grep Child | /usr/bin/wc
>
> How do I get per-node count ?

You could get it by passing that entire command to the slaves?
Something like slaves.sh  '/usr/java/default/bin/jps | /bin/grep Child
| /usr/bin/wc -l' should work I think, instead of aggregating in your
shell..


--=20
Harsh J
www.harshj.com