[jira] Resolved: (HADOOP-2897) [HOD] Remove script option from the core hod framework

["Hemanth Yamijala (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-2897?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Hemanth Yamijala resolved HADOOP-2897.
--------------------------------------

    Resolution: Won't Fix

In a discussion internally, it was decided to go with the approach of using the core hod interface itself for implementing this option, as opposed to a new command. This is in the interest of usability, and the fact that the script option is something existing users of HOD are quite used to. So, I am resolving this issue as 'Won't fix'

> [HOD] Remove script option from the core hod framework
> ------------------------------------------------------
>
>                 Key: HADOOP-2897
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2897
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: contrib/hod
>    Affects Versions: 0.16.0
>            Reporter: Hemanth Yamijala
>            Assignee: Hemanth Yamijala
>             Fix For: 0.16.1
>
>
> Hod currently allows the user to specify and run a hadoop script after allocation, and deallocating as soon as the script is done. For e.g.
> hod -m 3 -z ~/hadoop.script
> allocates 3 nodes, and runs ~/hadoop.script, then deallocates
> This is a convenient way single line wrapper around 4-5 commands that users have to write themselves. We have this because:
> - hod 0.3 does not provide an easy way to combine these into a single operation, because of the HOD shell.
> - even in hod 0.4, users have to carefully write some error checking code to make sure their cluster is allocated successfully, before running the script and their HADOOP_CONF_DIR should be set correctly.
> - users can free up clusters as soon as they are done.
> The requirements make sense. But having this as part of the core hod interface seems incorrect. The interface should be an orthogonal set of commands that each just do one thing well. The script option should be converted to a simple wrapper that can be part of the hod project. This way, users can enjoy the benefits of not having to write such a script themselves, while the hod codebase can still be clean.
> One disadvantage if we change this is that users will need to remember one more command. But given hod 0.4 is a new interface anyway, it is better to address now, rather than later. And we can alleviate this a bit by making sure options are consistently named between hod and the wrapper script.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.