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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3862) Create network topology plugin that uses a configured rack ip mask
Date Wed, 06 Aug 2008 05:34:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12620142#action_12620142
] 

Allen Wittenauer commented on HADOOP-3862:
------------------------------------------

Typically, netmasks are either defined as 0xffffff00 or 255.255.255.0 .  ff.ff.ff.00 just
looks weird to me. :)

Also, what happens if IPv6 is in use?

> Create network topology plugin that uses a configured rack ip mask
> ------------------------------------------------------------------
>
>                 Key: HADOOP-3862
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3862
>             Project: Hadoop Core
>          Issue Type: New Feature
>            Reporter: Owen O'Malley
>
> We should have a Java class that answers network topology questions by implementing DNSToSwitchMapping
by using the host's IP address and a mask that defines the addresses that are on the same
rack. Therefore, if your racks are defined by using the top 3 octets, you'd configure ff.ff.ff.00.

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