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From "Siddharth Wagle (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HDDS-700) Support rack awared node placement policy based on network topology
Date Fri, 17 May 2019 20:34:00 GMT

    [ https://issues.apache.org/jira/browse/HDDS-700?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16842560#comment-16842560
] 

Siddharth Wagle edited comment on HDDS-700 at 5/17/19 8:33 PM:
---------------------------------------------------------------

[~Sammi] If the topology is modeled as "*/d1/r1/ng/n*", will the cross rack logic still work
for replicas 3 and above? The current logic will choose the second replica on the same NG
but will the third replica correctly land on a separate rack and not just separate NG?


was (Author: swagle):
[~Sammi] If the topology is modeled as "*/d1/r1/ng/n*", will the cross rack logic still work
for replcas 3 and above? The current logic will choose the second replica on the same NG but
will the thrid replica correctly land on a separate rack and not just NG?

> Support rack awared node placement policy based on network topology
> -------------------------------------------------------------------
>
>                 Key: HDDS-700
>                 URL: https://issues.apache.org/jira/browse/HDDS-700
>             Project: Hadoop Distributed Data Store
>          Issue Type: Sub-task
>            Reporter: Xiaoyu Yao
>            Assignee: Sammi Chen
>            Priority: Major
>         Attachments: HDDS-700.01.patch
>
>
> Implement a new container placement policy implementation based datanode's network topology. 
It follows the same rule as HDFS.
> By default with 3 replica, two replica will be on the same rack, the third replica and
all the remaining replicas will be on different racks. 
>  
> {color:#808080} {color}



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