[jira] Commented: (PIG-205) Add a -n / -namenode parameter to pig command line

["Alan Gates (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PIG-205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12590539#action_12590539 ] 

Alan Gates commented on PIG-205:
--------------------------------

At a glance, the patch looks fine.  I think this raises a more fundamental question though.  What do we pass on the command line, and what do we expect to have in the configuration file?  I do not have a strong opinion about whether the namenode goes on the command line or not.  But I would like to have a general policy to guide us.  Currently we have the following items as command line options that are also in the configuration file:  log4jconf, cluster, hod params, and exectype, and Mathieu proposes to add namenode.  I can see three options

1) Remove all these and only set them via config file
2) Determine a set that are important enough they should be easy to set via the command line, everything else can only be set via the config file.  I'm guessing this set would be cluster, exectype, maybe namenode.  Of course you'd still be able to set these via config file.
3) Free for all, give command line options for whatever people want.

I definitely don't like 3, and 1 is probably not the best either.  So I'd vote for two.  

Thoughts, discussion?

> Add a -n / -namenode parameter to pig command line
> --------------------------------------------------
>
>                 Key: PIG-205
>                 URL: https://issues.apache.org/jira/browse/PIG-205
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Mathieu Poumeyrol
>         Attachments: NameNodeArg.patch, NameNodeArg.v2.patch
>
>
> -c allows to specify the cluster job tracker location from the command line. For this to be usefull in most case, I expect users to need specifying the dfs location too.

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