Mailing-List: contact core-dev-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: core-dev@hadoop.apache.org
Message-ID: <281638687.1219684904346.JavaMail.jira@brutus>
Date: Mon, 25 Aug 2008 10:21:44 -0700 (PDT)
From: "Jothi Padmanabhan (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-3514) Reduce seeks during shuffle, by
 inline crcs
In-Reply-To: <1777511993.1212934184996.JavaMail.jira@brutus>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


     [ https://issues.apache.org/jira/browse/HADOOP-3514?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jothi Padmanabhan updated HADOOP-3514:
--------------------------------------

    Attachment: hadoop-3514-v10.patch

Patch synched with the latest trunk.
Also incorporated Arun's offline comments on abstracting the checksum layer to IFile alone and away from the TaskTracker and MapTask.

> Reduce seeks during shuffle, by inline crcs
> -------------------------------------------
>
>                 Key: HADOOP-3514
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3514
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.18.0
>            Reporter: Devaraj Das
>            Assignee: Jothi Padmanabhan
>             Fix For: 0.19.0
>
>         Attachments: hadoop-3514-v1.patch, hadoop-3514-v10.patch, hadoop-3514-v2.patch, hadoop-3514-v3.patch, hadoop-3514-v4.patch, hadoop-3514-v5.patch, hadoop-3514-v6.patch, hadoop-3514-v7.patch, hadoop-3514-v8.patch, hadoop-3514-v9.patch, hadoop-3514.patch
>
>
> The number of seeks can be reduced by half in the iFile if we move the crc into the iFile rather than having a separate file.

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