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https://issues.apache.org/jira/browse/AMBARI-14524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15075094#comment-15075094
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Hadoop QA commented on AMBARI-14524:
------------------------------------
{color:green}+1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12779978/AMBARI-14524.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 4 new
or modified test files.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
ambari-server.
Test results:
https://builds.apache.org/job/Ambari-trunk-test-patch/4740//testReport/
Console output:
https://builds.apache.org/job/Ambari-trunk-test-patch/4740//console
This message is automatically generated.
> HDFS Recommendation: dfs.datanode.du.reserved should be set to 10%-15% of
> volume size
> -------------------------------------------------------------------------------------
>
> Key: AMBARI-14524
> URL: https://issues.apache.org/jira/browse/AMBARI-14524
> Project: Ambari
> Issue Type: Bug
> Components: stacks
> Affects Versions: 2.1.0
> Reporter: Dmytro Sen
> Assignee: Dmytro Sen
> Priority: Critical
> Fix For: 2.4.0
>
> Attachments: AMBARI-14524.patch
>
>
> PROBLEM: Ambari should give recommendations on this setting:
> dfs.datanode.du.reserved
> The default is 1GB and that is too low for a lot of our production customers.
> If this is too low and the space on the datanode fills up, the nodemanagers
> will start failing the health checks and we get into a bad state with not
> enough nodemanagers being up. At this point the admin tries to run the
> balancer and hope that it will balance very quickly.
> There should be a recommendation on this value based on the disk space
> available in the datanode volume. In addition, if the user sets it too low
> there should be a warning saying this will cause problems if enough buffer is
> not kept.
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