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Date: Fri, 18 Dec 2015 01:01:55 +0000 (UTC)
From: "jun aoki (JIRA)" <jira@apache.org>
To: dev@ambari.apache.org
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Subject: [jira] [Commented] (AMBARI-14301) Co-locate HAWQSEGMENT on hosts
 that have DATANODE component
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    [ https://issues.apache.org/jira/browse/AMBARI-14301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15063204#comment-15063204 ] 

jun aoki commented on AMBARI-14301:
-----------------------------------

thank you so much [~jaimin] for your insightful comment. That seems the right thing and we look forward to seeing getting AMBARI-14427 done. Let us know if we can help you guys on that as well.

> Co-locate HAWQSEGMENT on hosts that have DATANODE component 
> ------------------------------------------------------------
>
>                 Key: AMBARI-14301
>                 URL: https://issues.apache.org/jira/browse/AMBARI-14301
>             Project: Ambari
>          Issue Type: Improvement
>          Components: ambari-web
>    Affects Versions: trunk
>            Reporter: Lav Jain
>            Assignee: Lav Jain
>            Priority: Minor
>             Fix For: 2.3.0
>
>         Attachments: AMBARI-14301.patch
>
>
> Looks like stackadvisor is used only upon a fresh install if no changes are made to the master components. In that case, the client/slaves are installed on all the hosts, so HAWQSEGMENT is co-located with DATANODE by default.
> If HDFS is already installed and HAWQ is enabled using add services, then Ambari chooses all hosts that do not have a MASTER component installed. This determination is being done in the javascript code.
> This patch is changing the hostlist for HAWQSEGMENT to be the same as DATANODE in the latter case.


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