Mailing-List: contact common-issues-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: common-issues@hadoop.apache.org
Date: Wed, 4 Jul 2012 13:57:39 +0000 (UTC)
From: "Tsz Wo (Nicholas), SZE (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
Message-ID: <409070698.3333.1341410259566.JavaMail.jiratomcat@issues-vm>
In-Reply-To: <787059714.32794.1338788422876.JavaMail.jiratomcat@issues-vm>
Subject: [jira] [Commented] (HADOOP-8472) Implementation of
 ReplicaPlacementPolicyNodeGroup to support 4-layer network topology
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/HADOOP-8472?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13406534#comment-13406534 ] 

Tsz Wo (Nicholas), SZE commented on HADOOP-8472:
------------------------------------------------

I just have started a build.  The patch looks good to me except that please add some javadoc to BlockPlacementPolicyWithNodeGroup.  Thanks.
                
> Implementation of ReplicaPlacementPolicyNodeGroup to support 4-layer network topology
> -------------------------------------------------------------------------------------
>
>                 Key: HADOOP-8472
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8472
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: ha, io
>    Affects Versions: 1.0.0, 2.0.0-alpha
>            Reporter: Junping Du
>            Assignee: Junping Du
>         Attachments: HADOOP-8472-BlockPlacementPolicyWithNodeGroup-impl-v2.patch, HADOOP-8472-BlockPlacementPolicyWithNodeGroup-impl-v3.patch, HADOOP-8472-BlockPlacementPolicyWithNodeGroup-impl-v4.patch, HADOOP-8472-BlockPlacementPolicyWithNodeGroup-impl-v5.patch, HADOOP-8472-BlockPlacementPolicyWithNodeGroup-impl.patch
>
>
> A subclass of ReplicaPlacementPolicyDefault, ReplicaPlacementPolicyNodeGroup was developed along with unit tests to support the four-layer hierarchical topology.
> The replica placement strategy used in ReplicaPlacementPolicyNodeGroup virtualization is almost the same as the original one. The differences are:
> 1. The 3rd replica will be off node group of the 2nd replica
> 2. If there is no local node available, the 1st replica will be placed on a node in the local node group.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira