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From "Haohui Mai (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9117) Config file reader / options classes for libhdfs++
Date Tue, 10 Nov 2015 01:43:10 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14997815#comment-14997815
] 

Haohui Mai commented on HDFS-9117:
----------------------------------

bq. I can strip it down to the API you provided, but I wonder what use case it will be serving
then.

Please do.

Many users use Hadoop in a controlled environment. They know where the configuration is and
has preferences on not depending on environment variables as they can be changed easily. Cloud
deployment is one example.

It's relatively starightforward to add these functionality to another layer but it's hard
to take it out when it's coupled with the core layer.

> Config file reader / options classes for libhdfs++
> --------------------------------------------------
>
>                 Key: HDFS-9117
>                 URL: https://issues.apache.org/jira/browse/HDFS-9117
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs-client
>    Affects Versions: HDFS-8707
>            Reporter: Bob Hansen
>            Assignee: Bob Hansen
>         Attachments: HDFS-9117.HDFS-8707.001.patch, HDFS-9117.HDFS-8707.002.patch, HDFS-9117.HDFS-8707.003.patch,
HDFS-9117.HDFS-8707.004.patch, HDFS-9117.HDFS-8707.005.patch, HDFS-9117.HDFS-8707.006.patch,
HDFS-9117.HDFS-8707.008.patch, HDFS-9117.HDFS-8707.009.patch, HDFS-9117.HDFS-8707.010.patch,
HDFS-9117.HDFS-8707.011.patch, HDFS-9117.HDFS-8707.012.patch, HDFS-9117.HDFS-9288.007.patch
>
>
> For environmental compatability with HDFS installations, libhdfs++ should be able to
read the configurations from Hadoop XML files and behave in line with the Java implementation.
> Most notably, machine names and ports should be readable from Hadoop XML configuration
files.
> Similarly, an internal Options architecture for libhdfs++ should be developed to efficiently
transport the configuration information within the system.



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