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From "Uma Maheswara Rao G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5215) dfs.datanode.du.reserved is not taking effect as it's not considered while getting the available space
Date Wed, 18 Sep 2013 04:37:52 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13770418#comment-13770418
] 

Uma Maheswara Rao G commented on HDFS-5215:
-------------------------------------------

I think its a nice finding Brahma, planning to post a patch?

You can also add a test which can detect this issue. We may not find this issue until you
have some unuseable space in the partition right?
                
> dfs.datanode.du.reserved is not taking effect as it's not considered while getting the
available space
> ------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-5215
>                 URL: https://issues.apache.org/jira/browse/HDFS-5215
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: datanode
>            Reporter: Brahma Reddy Battula
>            Assignee: Brahma Reddy Battula
>
> {code}public long getAvailable() throws IOException {
>     long remaining = getCapacity()-getDfsUsed();
>     long available = usage.getAvailable();
>     if (remaining > available) {
>       remaining = available;
>     }
>     return (remaining > 0) ? remaining : 0;
>   } 
> {code}
> Here we are not considering the reserved space while getting the Available Space.

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