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From Sebastian Schelter <>
Subject Re: Library of ML and Graph Mining algorithms
Date Sat, 01 Mar 2014 13:05:47 GMT
Hi Dionysios,

 > We were going to send an e-mail to the giraph mailing lists soon, but
 > it's good to see you already discovered the site.

I didn't discover it, your colleague Alexandros presented okapi at the 
RecSys meetup in Berlin :) I'm very eager to see it, especially the 
modifications you made for incremental processing of realtime graphs.


On 02/28/2014 04:36 PM, Dionysis Logothetis wrote:
> Hi all,
> We were going to send an e-mail to the giraph mailing lists soon, but
> it's good to see you already discovered the site. is a
> general project on tools for ML and graph mining that we started at
> Telefonica Research and for the most part revolves around Giraph. In
> this context, we've been developing a library of algorithms for Giraph
> that we call Okapi.
> We started developing and using Okapi internally for research
> purposes and we thought it'd be good to open source it. We've been
> working on this for some time, and after some final testing, we're
> ready to release a first version of it (a couple of the algorithm
> implementations are still under testing).
> So far we've developed some state-of-the-art machine
> learning/recommendation algorithms and graph mining algorithms. In
> general, we'd like to build more applications in these areas and
> potentially new categories of algorithms that fit well on top of
> Giraph. If you have any suggestions, let us know!
> As you'll see we're releasing Okapi under the Apache license. We hope
> to get contributions from the Giraph community and make this a rich
> and useful library for everybody. This could be in the form of new
> algorithms, fixes etc. In the long term we'd like Okapi to become an
> Apache project if this makes sense, something similar to Mahout. If
> you have any feedback about this or would like to get involved more
> please do get in touch with us.
> Thanks!
> On Fri, Feb 28, 2014 at 9:26 AM, Pavan Kumar A <> wrote:
>> +1 :)
>>> Date: Fri, 28 Feb 2014 00:00:55 -0800
>>> From:
>>> To:
>>> Subject: Re: Fyi: Graphos
>>> Thanks for the link, this looks pretty neat.
>>> On 2/27/14, 11:29 PM, Sebastian Schelter wrote:
>>>> Hi,
>>>> It seems a team from Telefonica built a machine learning library on
>>>> top of Giraph:
>>>> Looks pretty interesting to me :)
>>>> Best,
>>>> Sebastian

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