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From Dmitriy Lyubimov <>
Subject Re: Mahout on Spark?
Date Wed, 19 Feb 2014 08:27:27 GMT
Unfortunately methinks the prospects of something like Mahout/MLLib merge
seem very unlikely due to vastly diverged approach to the basics of linear
algebra (and other things). Just like one cannot grow single tree out of
two trunks -- not easily, anyway.

It is fairly easy to port (and subsequently beat) MLib at this point from
collection of algorithms point of view. But IMO goal should be more
MLI-like first, and port second. And be very careful with concepts.
Something that i so far don't see happening with MLib. MLib seems to be
old-style Mahout-like rush to become a collection of basic algorithms
rather than coherent foundation. Admittedly, i havent looked very closely.

On Tue, Feb 18, 2014 at 11:41 PM, Sebastian Schelter <> wrote:

> I'm also convinced that Spark is a superior platform for executing
> distributed ML algorithms. We've had a discussion about a change from
> Hadoop to another platform some time ago, but at that point in time it was
> not clear which of the upcoming dataflow processing systems (Spark,
> Hyracks, Stratosphere) would establish itself amongst the users. To me it
> seems pretty obvious that Spark made the race.
> I concur with Ted, it would be great to have the communities work
> together. I know that at least 4 mahout committers (including me) are
> already following Spark's mailinglist and actively participating in the
> discussions.
> What are the ideas how a fruitful cooperation look like?
> Best,
> Sebastian
> PS:
> I ported LLR-based cooccurrence analysis (aka item-based recommendation)
> to Spark some time ago, but I haven't had time to test my code on a large
> dataset yet. I'd be happy to see someone help with that.
> On 02/19/2014 08:04 AM, Nick Pentreath wrote:
>> I know the Spark/Mllib devs can occasionally be quite set in ways of
>> doing certain things, but we'd welcome as many Mahout devs as possible to
>> work together.
>> It may be too late, but perhaps a GSoC project to look at a port of some
>> stuff like co occurrence recommender and streaming k-means?
>> N
>> --
>> Sent from Mailbox for iPhone
>> On Wed, Feb 19, 2014 at 3:02 AM, Ted Dunning <>
>> wrote:
>>  On Tue, Feb 18, 2014 at 1:58 PM, Nick Pentreath <
>>>> My (admittedly heavily biased) view is Spark is a superior platform
>>>> overall
>>>> for ML. If the two communities can work together to leverage the
>>>> strengths
>>>> of Spark, and the large amount of good stuff in Mahout (as well as the
>>>> fantastic depth of experience of Mahout devs) I think a lot can be
>>>> achieved!
>>>>  It makes a lot of sense that Spark would be better than Hadoop for ML
>>> purposes given that Hadoop was intended to do web-crawl kinds of things
>>> and
>>> Spark was intentionally built to support machine learning.
>>> Given that Spark has been announced by a majority of the Hadoop-based
>>> distribution vendors, it makes sense that maybe Mahout should jump in.
>>> I really would prefer it if the two communities (MLib/MLI and Mahout)
>>> could
>>> work more closely together.  There is a lot of good to be had on both
>>> sides.

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