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MapReduce >> mail # user >> Re: services requiring topology conf


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Adam Faris 2013-01-11, 17:15
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Re: services requiring topology conf
Thanks Adam!
On Fri, Jan 11, 2013 at 12:15 PM, Adam Faris <[EMAIL PROTECTED]> wrote:

> A patch was submitted for topology documentation, but it doesn't appear to
> have made it to any releases.  This svn link may help starting at line 1294.
>
> http://svn.apache.org/viewvc?view=revision&revision=1411359
>
> Assuming you are using hadoop 1.x and not yarn, the topology script only
> needs to be on the namenode and jobtracker.  As you have noticed it doesn't
> hurt anything if you copy the script everywhere as the tasktracker and
> datanode process will ignore it.   Try looking at pdsh for controlling
> compute nodes and pushing files, but be careful as if you type a bad
> command it's going to get ran everywhere. http://code.google.com/p/pdsh/
>
> -- Adam
>
>
> On Jan 11, 2013, at 9:01 AM, Bryan Beaudreault <[EMAIL PROTECTED]>
> wrote:
>
> > The documentation on topology conf (topology.script.file.name) is a
> little sparse, and while we have it working in our cluster I am trying to
> make it a little easier to configure.
> >
> > Currently we upload a python file and conf file to every node in our
> cluster.  However I have a feeling that it is only needed on the
> NameNode(s) and perhaps JobTracker.  I checked the code for DataNode and
> see no reference to this configuration parameter, but I wanted to check
> with you all before I stop updating the conf on every one of my nodes.
> >
> > Can anyone confirm whether these configuration files only need to be
> present on the NameNode/JobTracker, or do they need to be on every node in
> a cluster?
> >
> > Thanks
>
>