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Date: Wed, 11 Apr 2012 04:00:24 +0000 (UTC)
From: "Eli Collins (Commented) (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HADOOP-8198) Support multiple network
 interfaces
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    [ https://issues.apache.org/jira/browse/HADOOP-8198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13251292#comment-13251292 ] 

Eli Collins commented on HADOOP-8198:
-------------------------------------

Use case 2 is the primary motivation,as you point out use case #1 can be addressed purely with host-level bonding. The two scenarios I care most about, that will be used widely, are:
# Systems where the on-cluster traffic is on a cluster-private, high-speed (eg infiniband) network, and off-cluster access from clients goes over a separate network.
# Systems where the cluster needs a dedicated, high-performance link with an adjacent system (another Hadoop cluster, an EDW, etc)

Agree wrt HADOOP-7510, I've been discussing moving tokens off IPs and to hostname or a host-level identifier with Daryn. I think we need to tackle this for HA as well, he's got some good ideas here.
                
> Support multiple network interfaces
> -----------------------------------
>
>                 Key: HADOOP-8198
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8198
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: io, performance
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>         Attachments: MultipleNifsv1.pdf, MultipleNifsv2.pdf, MultipleNifsv3.pdf
>
>
> Hadoop does not currently utilize multiple network interfaces, which is a common user request, and important in enterprise environments. This jira covers a proposal for enhancements to Hadoop so it better utilizes multiple network interfaces. The primary motivation being improved performance, performance isolation, resource utilization and fault tolerance. The attached design doc covers the high-level use cases, requirements, a proposal for trunk/0.23, discussion on related features, and a proposal for Hadoop 1.x that covers a subset of the functionality of the trunk/0.23 proposal.

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