Return-Path: 
 <core-dev-return-33056-apmail-hadoop-core-dev-archive=hadoop.apache.org@hadoop.apache.org>
Delivered-To: apmail-hadoop-core-dev-archive@www.apache.org
Received: (qmail 90399 invoked from network); 13 Mar 2008 15:24:03 -0000
Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2)
  by minotaur.apache.org with SMTP; 13 Mar 2008 15:24:03 -0000
Received: (qmail 53407 invoked by uid 500); 13 Mar 2008 15:23:58 -0000
Delivered-To: apmail-hadoop-core-dev-archive@hadoop.apache.org
Received: (qmail 53371 invoked by uid 500); 13 Mar 2008 15:23:58 -0000
Mailing-List: contact core-dev-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
List-Help: <mailto:core-dev-help@hadoop.apache.org>
List-Unsubscribe: <mailto:core-dev-unsubscribe@hadoop.apache.org>
List-Post: <mailto:core-dev@hadoop.apache.org>
List-Id: <core-dev.hadoop.apache.org>
Reply-To: core-dev@hadoop.apache.org
Delivered-To: mailing list core-dev@hadoop.apache.org
Received: (qmail 53338 invoked by uid 99); 13 Mar 2008 15:23:58 -0000
Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230)
    by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 13 Mar 2008 08:23:58 -0700
X-ASF-Spam-Status: No, hits=-2000.0 required=10.0
	tests=ALL_TRUSTED
X-Spam-Check-By: apache.org
Received: from [140.211.11.140] (HELO brutus.apache.org) (140.211.11.140)
    by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 13 Mar 2008 15:23:17 +0000
Received: from brutus (localhost [127.0.0.1])
	by brutus.apache.org (Postfix) with ESMTP id 81191234C0A1
	for <core-dev@hadoop.apache.org>; Thu, 13 Mar 2008 08:22:24 -0700 (PDT)
Message-ID: <1131261728.1205421744527.JavaMail.jira@brutus>
Date: Thu, 13 Mar 2008 08:22:24 -0700 (PDT)
From: "Tom White (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-1328) Hadoop Streaming needs to provide a
 way for the stream plugin to update global counters
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
X-Virus-Checked: Checked by ClamAV on apache.org


     [ https://issues.apache.org/jira/browse/HADOOP-1328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tom White updated HADOOP-1328:
------------------------------

    Attachment: hadoop-1328.patch

This patch adds support for counters in streaming. Scripts write lines to standard error of the form:

counter:<group>,<counter>,<amount>

For example, in python you might write

sys.stderr.write("counter:counters,linecount,1\n")


> Hadoop Streaming needs to provide a way for the stream plugin to update global counters
> ---------------------------------------------------------------------------------------
>
>                 Key: HADOOP-1328
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1328
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: contrib/streaming
>            Reporter: Runping Qi
>            Assignee: Christopher Zimmerman
>         Attachments: hadoop-1328.patch
>
>
> Sometimes, the stream plugin may want to create/update its own global counters.
> There is no way to do so currently.
> One possible way to enable that is to use the stderr output of the stream process.
> The stream process can emit the global counter update information (such as GLOCAL_COUNTER COUNTER_NAME NUM)
> to the stderr of the process. The Stderr handling thread can call the global counter API whenever it encounters the global counter update information line.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.