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From Joshua Bronson <jabron...@gmail.com>
Subject Re: mahout for news recommendation?
Date Wed, 01 Apr 2009 20:27:50 GMT
You mean you're supposed to do step 4 *before* step 8?!? ;p
I did run mvn install, and thought I got a bunch of warnings like the
following:

[WARNING] Entry:
> mahout-0.2-SNAPSHOT/usr/local/melk/mahout/core/src/main/java/org/apache/mahout/cf/taste/impl/common/
> longer than 100 characters.
>

after a couple hours it said it completed successfully:

[INFO]
> ------------------------------------------------------------------------
>
[INFO] Reactor Summary:
>
[INFO]
> ------------------------------------------------------------------------
>
[INFO] Mahout core ........................................... SUCCESS
> [8:46.665s]
>
[INFO] Mahout Taste Webapp ................................... SUCCESS
> [55.496s]
>
[INFO] Mahout examples ....................................... SUCCESS
> [55.317s]
>
[INFO] Apache Lucene Mahout .................................. SUCCESS
> [2:02:03.392s]
>
[INFO]
> ------------------------------------------------------------------------
>
[INFO]
> ------------------------------------------------------------------------
>
[INFO] BUILD SUCCESSFUL
>
[INFO]
> ------------------------------------------------------------------------
>
[INFO] Total time: 132 minutes 41 seconds
>
[INFO] Finished at: Wed Apr 01 00:59:27 EDT 2009
>
[INFO] Final Memory: 61M/80M
>
[INFO]
> ------------------------------------------------------------------------
>


So I proceeded through steps 5, 6, and 7, and then step 8's "mvn package"
command failed with the output I linked to.

Just for the heck of it I tried "mvn install" again (from the top-level
directory) and after getting a bunch of the "longer-than-100-characters"
warnings again, this time after 7 minutes it failed with:

[ERROR] BUILD ERROR
>
[INFO]
> ------------------------------------------------------------------------
>
[INFO] Failed to create assembly: Error creating assembly archive project: A
> tar file cannot include itself.
>


I posted the full transcript of my console session at
http://melkjug.org/_static/grouplens-install-log.txt. Seems like something
funky's going on with tar, but I'm not sure what.


On Wed, Apr 1, 2009 at 12:11 PM, Grant Ingersoll <gsingers@apache.org>wrote:

> Do a "mvn install" from the top level directory first:
> http://lucene.apache.org/mahout/taste.html#demo
>
> HTH,
> Grant
>
>
> On Apr 1, 2009, at 11:35 AM, Joshua Bronson wrote:
>
>  Thanks all for the good info. Taste definitely sounds like a promising
>> direction for us to go in for our recommendation service.
>> I'm working through the installation of the GroupLens demo, but the mvn
>> package step is failing with the output at
>> http://paste.pocoo.org/show/110618/. Haven't looked into this yet, just
>> thought I'd post to the list first with my progress. If anyone else uses
>> IRC, I've created (and am currently the only one in) the #mahout channel
>> on
>> freenode. Hope to see some of you in there!
>>
>> Josh
>>
>> On Wed, Apr 1, 2009 at 5:48 AM, Sean Owen <srowen@gmail.com> wrote:
>>
>>  Couple clarifications -
>>>
>>> The CF components are oriented to on-line, real-time use, though of
>>> course
>>> one can trivially build a batch job out of that. That is what I did with
>>> the
>>> EC2 image that cranks out recommendations for all users.
>>>
>>> The CF component is also already parallelized as much as is practical.
>>> There
>>> are already Hadoop jobs for parallel, batch operation.
>>>
>>> Finally if you have some external notion of item similarity, like text
>>> similarity between articles, you can and should include this info by
>>> creating an ItemSimilarity with this knowledge. In that case you want to
>>> use
>>> an item-based recommender, since it is only in such a case that
>>> item-based
>>> recommenders have a distinct advantage.
>>>
>>> On Apr 1, 2009 10:32 AM, "Otis Gospodnetic" <otis_gospodnetic@yahoo.com>
>>> wrote:
>>>
>>>
>>> it's the former.  Taste is still not parallelized, but other parts of
>>> Mahout
>>> are, and they make use of Hadoop.
>>>
>>>
> --------------------------
> Grant Ingersoll
> http://www.lucidimagination.com/
>
> Search the Lucene ecosystem (Lucene/Solr/Nutch/Mahout/Tika/Droids) using
> Solr/Lucene:
> http://www.lucidimagination.com/search
>
>

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