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Posted to common-issues@hadoop.apache.org by "MaoYuan Xian (JIRA)" <ji...@apache.org> on 2014/06/04 14:43:02 UTC

[jira] [Updated] (HADOOP-10434) Is it possible to use "df" to calculate the dfs usage instead of "du"

     [ https://issues.apache.org/jira/browse/HADOOP-10434?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

MaoYuan Xian updated HADOOP-10434:
----------------------------------

    Attachment: HADOOP-10434-1.patch

> 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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