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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