Mailing-List: contact hdfs-issues-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: hdfs-issues@hadoop.apache.org
Date: Fri, 11 Nov 2011 12:10:52 +0000 (UTC)
From: "Harsh J (Commented) (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Message-ID: 
 <614033527.20890.1321013452836.JavaMail.tomcat@hel.zones.apache.org>
In-Reply-To: 
 <806323341.16371.1320892671611.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Commented] (HDFS-2547) Design doc is wrong about default
 block placement policy.
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/HDFS-2547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13148445#comment-13148445 ] 

Harsh J commented on HDFS-2547:
-------------------------------

Aaron,

{{BlockPlacementPolicyDefault}} has proper comments in it, on trunk. It was 0.20's ReplicationTargetChooser that threw me off there. Reopening to fix against 0.20.
                
> Design doc is wrong about default block placement policy.
> ---------------------------------------------------------
>
>                 Key: HDFS-2547
>                 URL: https://issues.apache.org/jira/browse/HDFS-2547
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.20.1
>            Reporter: Harsh J
>            Assignee: Harsh J
>            Priority: Trivial
>             Fix For: 0.24.0
>
>         Attachments: HDFS-2547.patch
>
>
> bq. For the common case, when the replication factor is three, HDFS's placement policy is to put one replica on one node in the local rack, another on a node in a different (remote) rack, and the last on a different node in the same *remote* rack.
> Should actually be: "and the last on a different node in the same *local* rack."

--
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