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From "genericqa (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-13283) Percentage based Reserved Space Calculation for DataNode
Date Mon, 30 Apr 2018 22:13:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-13283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16459163#comment-16459163
] 

genericqa commented on HDFS-13283:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m  0s{color} | {color:blue}
Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red}  0m  6s{color} | {color:red}
HDFS-13283 does not apply to trunk. Rebase required? Wrong Branch? See https://wiki.apache.org/hadoop/HowToContribute
for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | HDFS-13283 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12921316/HDFS-13283_branch-2.000.patch
|
| Console output | https://builds.apache.org/job/PreCommit-HDFS-Build/24113/console |
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This message was automatically generated.



> Percentage based Reserved Space Calculation for DataNode
> --------------------------------------------------------
>
>                 Key: HDFS-13283
>                 URL: https://issues.apache.org/jira/browse/HDFS-13283
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: datanode, hdfs
>            Reporter: Lukas Majercak
>            Assignee: Lukas Majercak
>            Priority: Major
>             Fix For: 3.2.0, 3.1.1
>
>         Attachments: HDFS-13283.000.patch, HDFS-13283.001.patch, HDFS-13283.002.patch,
HDFS-13283.003.patch, HDFS-13283.004.patch, HDFS-13283.005.patch, HDFS-13283.006.patch, HDFS-13283.007.patch,
HDFS-13283_branch-2.000.patch, HDFS-13283_branch-3.0.000.patch
>
>
> Currently, the only way to configure reserved disk space for non-HDFS data on a DataNode
is a constant value via {{dfs.datanode.du.reserved}}. This can be an issue in non-heterogeneous
clusters where size of DNs can differ. The proposed solution is to allow percentage based
configuration (and their combination):
>  # ABSOLUTE
>  ** based on absolute number of reserved space
>  # PERCENTAGE
>  ** based on percentage of total capacity in the storage
>  # CONSERVATIVE
>  ** calculates both of the above and takes the one that will yield more reserved space
>  # AGGRESSIVE
>  ** calculates 1. 2. and takes the one that will yield less reserved space
>  



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