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From "Daniel Templeton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12702) Add an HDFS metrics sink
Date Tue, 12 Jan 2016 00:19:39 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15092977#comment-15092977
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Daniel Templeton commented on HADOOP-12702:
-------------------------------------------

I originally used {{NetUtils.getHostname}}, but it requires string parsing
to get just the hostname.  Under the covers it uses {{InetAddress}}, so it
seemed silly to use the wrapper and then spend effort undoing what it does.



> Add an HDFS metrics sink
> ------------------------
>
>                 Key: HADOOP-12702
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12702
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: metrics
>    Affects Versions: 2.7.1
>            Reporter: Daniel Templeton
>            Assignee: Daniel Templeton
>         Attachments: HADOOP-12702.001.patch
>
>
> We need a metrics2 sink that can write metrics to HDFS. The sink should accept as configuration
a "directory prefix" and do the following in {{putMetrics()}}
> * Get yyyyMMddHH from current timestamp.
> * If HDFS dir "dir prefix" + yyyyMMddHH doesn't exist, create it. Close any currently
open file and create a new file called <hostname>.log in the new directory.
> * Write metrics to the current log file.
> * If a write fails, it should be fatal to the process running the sink.



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