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https://issues.apache.org/jira/browse/AMBARI-14524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15075190#comment-15075190
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Hudson commented on AMBARI-14524:
---------------------------------
SUCCESS: Integrated in Ambari-trunk-Commit #4108 (See
[https://builds.apache.org/job/Ambari-trunk-Commit/4108/])
AMBARI-14524 HDFS Recommendation: dfs.datanode.du.reserved should be set (dsen:
[http://git-wip-us.apache.org/repos/asf?p=ambari.git&a=commit&h=ce4e4ea305f0ede6fa7129063751d37e19b72d03])
*
ambari-server/src/main/resources/common-services/HDFS/2.1.0.2.0/configuration/hdfs-site.xml
* ambari-server/src/test/python/stacks/2.3/common/test_stack_advisor.py
* ambari-server/src/test/python/stacks/2.0.6/common/test_stack_advisor.py
* ambari-server/src/main/resources/stacks/HDP/2.3/services/stack_advisor.py
* ambari-server/src/test/python/stacks/2.2/common/test_stack_advisor.py
* ambari-server/src/main/resources/stacks/HDP/2.0.6/services/stack_advisor.py
* ambari-server/src/test/python/stacks/2.1/common/test_stack_advisor.py
* ambari-server/src/main/resources/stacks/HDP/2.2/services/stack_advisor.py
> 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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