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Date: Wed, 11 Apr 2007 14:04:32 -0700 (PDT)
From: "Hairong Kuang (JIRA)" <jira@apache.org>
To: hadoop-dev@lucene.apache.org
Subject: [jira] Updated: (HADOOP-1155) Additional performance improvement to
 chooseTarget
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     [ https://issues.apache.org/jira/browse/HADOOP-1155?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hairong Kuang updated HADOOP-1155:
----------------------------------

    Attachment: rackMap3.patch

This patch incorprates many good suggestions given by Raghu. Thanks Raghu.

> Additional performance improvement to chooseTarget
> --------------------------------------------------
>
>                 Key: HADOOP-1155
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1155
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: dfs
>    Affects Versions: 0.12.2
>            Reporter: Hairong Kuang
>         Assigned To: Hairong Kuang
>             Fix For: 0.13.0
>
>         Attachments: rackMap.patch, rackMap1.patch, rackMap2.patch, rackMap3.patch
>
>
> A few additional thoughts to improve the performance of chooseTarget:
> 1. Reduce the # of calls to getDistance in sortedByDistance
> 2. Improve the performance of getNode by adding a rack name to rack node map

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