Hadoop Taste

[Sean Owen <sr...@gmail.com>]

(Copying and pasting a message that got lost, on behalf of Chris --)

It's really a matter of running RecommenderJob locally. It is a Java program
that kicks off the Hadoop jobs. You need to have a Hadoop cluster running
locally and configured as described at hadoop.apache.org, but beyond that
should just work. (It's covered in some detail in the book Mahout in
Action.)

------------

Hello,

Are there any examples of deploying a taste application with Hadoop.  I am
pretty new to Mahout and hadoop/MapReduce in general.  I have many of the
simple examples running, but have seen no examples for running with hadoop.
 If you can point me in the right direction, that would help a lot.  If not,
I will try to come up with more specific questions.

Thanks
Chris S.

Re: Hadoop Taste

[Sean Owen <sr...@gmail.com>]

To answers your other questions -- I think you have a mixture of old and new
compiled code somewhere. NoSuchMethodError can only happen when something
that worked at compile time no longer works at runtime. I'd do a full clean
build and ensure the .jar files you think are you using are the ones you
are.

The Netflix and Bookcrossing examples are for the non-distributed
implementation. *That* code has nothing to do with Hadoop, so in that sense
no you can't run on Hadoop. However you can surely apply the distributed
code to these data sets if you like (modulo adjusting the input format).

On Sat, Oct 2, 2010 at 2:22 PM, Chris Schilling
<ch...@gmail.com>wrote:

> Thanks Sean,
>
> Yeah, earlier I was just posting to the forums manually not via email.  I
> guess my earlier messages were just not seen.  Can you address my issue of
> the crash when running RecommenderJob with the GenericItemBasedRecommender.
>  Like I said in my other post, I got it working with the
> SlopeOneRecommender.  As I posted here:
>
> http://lucene.472066.n3.nabble.com/org-apache-mahout-cf-taste-hadoop-pseudo-RecommenderJob-td1617640.html#a1617640
>
> So, I assume that it is also possible to run the Netflix and Bookcrossing
> examples on hadoop?  I am still not sure how easy that is.  Now that I have
> my small example working though, I have a better idea of whats going on.
>
> Ill check out the book in MIA.  If I have any further questions, Ill be
> sure to post via email from now on.
>
> Thanks for your help
> Chris
>
>
>
> On Oct 2, 2010, at 1:00 AM, Sean Owen wrote:
>
> (Copying and pasting a message that got lost, on behalf of Chris --)
>
> It's really a matter of running RecommenderJob locally. It is a Java
> program that kicks off the Hadoop jobs. You need to have a Hadoop cluster
> running locally and configured as described at hadoop.apache.org, but
> beyond that should just work. (It's covered in some detail in the book
> Mahout in Action.)
>
> ------------
>
> Hello,
>
> Are there any examples of deploying a taste application with Hadoop.  I am
> pretty new to Mahout and hadoop/MapReduce in general.  I have many of the
> simple examples running, but have seen no examples for running with hadoop.
>  If you can point me in the right direction, that would help a lot.  If not,
> I will try to come up with more specific questions.
>
> Thanks
> Chris S.
>
>
>