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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10434) Is it possible to use "df" to calculate the dfs usage instead of "du"
Date Wed, 04 Jun 2014 12:57:02 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10434?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14017670#comment-14017670

Hadoop QA commented on HADOOP-10434:

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  against trunk revision .

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/4006//console

This message is automatically generated.

> Is it possible to use "df" to calculate the dfs usage instead of "du"
> ---------------------------------------------------------------------
>                 Key: HADOOP-10434
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10434
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: fs
>    Affects Versions: 2.3.0
>            Reporter: MaoYuan Xian
>            Priority: Minor
>             Fix For: 2.3.0
>         Attachments: HADOOP-10434-1.patch
> When we run datanode from the machine with big disk volume, it's found du operations
from org.apache.hadoop.fs.DU's DURefreshThread cost lots of disk performance.
> As we use the whole disk for hdfs storage, it is possible calculate volume usage via
"df" command. Is it necessary adding the "df" option for usage calculation in hdfs (org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.BlockPoolSlice)?

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