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From "Patrick Angeles (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-7030) new topology mapping implementations
Date Fri, 12 Nov 2010 05:09:14 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-7030?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Patrick Angeles updated HADOOP-7030:
------------------------------------

    Status: Patch Available  (was: Open)

> new topology mapping implementations
> ------------------------------------
>
>                 Key: HADOOP-7030
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7030
>             Project: Hadoop Common
>          Issue Type: New Feature
>    Affects Versions: 0.21.0, 0.20.2, 0.20.1
>            Reporter: Patrick Angeles
>         Attachments: topology.patch
>
>
> The default ScriptBasedMapping implementation of DNSToSwitchMapping for determining cluster
topology has some drawbacks. Principally, it forks to an OS-specific script.
> This issue proposes two new Java implementations of DNSToSwitchMapping. TableMapping
reads a two column text file that maps an IP or hostname to a rack ID. Ip4RangeMapping reads
a three column text file where each line represents a start and end IP range plus a rack ID.

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