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Posted to common-dev@hadoop.apache.org by "Patrick Angeles (JIRA)" <ji...@apache.org> on 2010/11/12 06:09:14 UTC

[jira] Created: (HADOOP-7030) new topology mapping implementations

new topology mapping implementations
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                 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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