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Posted to user@mahout.apache.org by WangRamon <ra...@hotmail.com> on 2011/11/10 08:34:25 UTC
User based CF
Hi All Dose mahout provide a user based CF implementation on Hadoop? Currently i only see an item based hadoop implementations. Thanks. CheersRamon
Re: User based CF
Posted by Akshay Jain <ja...@gmail.com>.
Is there any place I can get to know what all "distributed" algo's are
available in Mahout?
On Thu, Nov 10, 2011 at 2:18 PM, Sean Owen <sr...@gmail.com> wrote:
> You mean "slope-one"? That is a non-distributed algorithm. It also
> slows down as the number of items, not users, increases, so would not
> be helpful.
>
> He is asking about distributed Hadoop-based algorithms though. There
> are certainly user-based non-distributed algorithms.
>
> On Thu, Nov 10, 2011 at 8:32 AM, VIGNESH PRAJAPATI
> <vi...@gmail.com> wrote:
> > ya WangRamon I have used Slop based Cf algorithm,its slow and time
> consuming..
> >
> > On 11/10/11, WangRamon <ra...@hotmail.com> wrote:
> >>
> >> Thanks Sebastian, can i assume that if there are more items than users,
> item
> >> based CF will be slow.
> >> > Date: Thu, 10 Nov 2011 08:43:53 +0100
> >>> From: ssc@apache.org
> >>> To: user@mahout.apache.org
> >>> Subject: Re: User based CF
> >>>
> >>> There is no such implementation. Literature suggests that an item-based
> >>> approach is usually both faster and more accurate.
> >>>
> >>> --sebastian
> >>>
> >>>
> >>> On 10.11.2011 08:34, WangRamon wrote:
> >>> >
> >>> >
> >>> >
> >>> >
> >>> > Hi All Dose mahout provide a user based CF implementation on Hadoop?
> >>> > Currently i only see an item based hadoop implementations. Thanks.
> >>> > CheersRamon
> >>>
> >>
> >
> >
> > --
> >
> >
> > *Vignesh Prajapati*
> > Tel: 9427415949 |
> > vignesh2066@gmail.com | www.vipras.com.co.in
> > MYTK [image: Facebook] <https://www.facebook.com/vigs143> [image:
> > Twitter]<http://twitter.com/#%21/vigs143> [image:
> > LinkedIn] <http://www.linkedin.com/pub/vignesh-prajapati/37/756/46a>
> [image:
> > about.me] <http://www.way4fun.tk><
> http://r1.wisestamp.com/r/landing?promo=7&dest=http%3A%2F%2Fwww.wisestamp.com%2Femail-install%3Futm_source%3Dextension%26utm_medium%3Demail%26utm_campaign%3Dpromo_7
> >
> >
>
Re: User based CF
Posted by Sean Owen <sr...@gmail.com>.
You mean "slope-one"? That is a non-distributed algorithm. It also
slows down as the number of items, not users, increases, so would not
be helpful.
He is asking about distributed Hadoop-based algorithms though. There
are certainly user-based non-distributed algorithms.
On Thu, Nov 10, 2011 at 8:32 AM, VIGNESH PRAJAPATI
<vi...@gmail.com> wrote:
> ya WangRamon I have used Slop based Cf algorithm,its slow and time consuming..
>
> On 11/10/11, WangRamon <ra...@hotmail.com> wrote:
>>
>> Thanks Sebastian, can i assume that if there are more items than users, item
>> based CF will be slow.
>> > Date: Thu, 10 Nov 2011 08:43:53 +0100
>>> From: ssc@apache.org
>>> To: user@mahout.apache.org
>>> Subject: Re: User based CF
>>>
>>> There is no such implementation. Literature suggests that an item-based
>>> approach is usually both faster and more accurate.
>>>
>>> --sebastian
>>>
>>>
>>> On 10.11.2011 08:34, WangRamon wrote:
>>> >
>>> >
>>> >
>>> >
>>> > Hi All Dose mahout provide a user based CF implementation on Hadoop?
>>> > Currently i only see an item based hadoop implementations. Thanks.
>>> > CheersRamon
>>>
>>
>
>
> --
>
>
> *Vignesh Prajapati*
> Tel: 9427415949 |
> vignesh2066@gmail.com | www.vipras.com.co.in
> MYTK [image: Facebook] <https://www.facebook.com/vigs143> [image:
> Twitter]<http://twitter.com/#%21/vigs143> [image:
> LinkedIn] <http://www.linkedin.com/pub/vignesh-prajapati/37/756/46a> [image:
> about.me] <http://www.way4fun.tk><http://r1.wisestamp.com/r/landing?promo=7&dest=http%3A%2F%2Fwww.wisestamp.com%2Femail-install%3Futm_source%3Dextension%26utm_medium%3Demail%26utm_campaign%3Dpromo_7>
>
Re: User based CF
Posted by VIGNESH PRAJAPATI <vi...@gmail.com>.
ya WangRamon I have used Slop based Cf algorithm,its slow and time consuming..
On 11/10/11, WangRamon <ra...@hotmail.com> wrote:
>
> Thanks Sebastian, can i assume that if there are more items than users, item
> based CF will be slow.
> > Date: Thu, 10 Nov 2011 08:43:53 +0100
>> From: ssc@apache.org
>> To: user@mahout.apache.org
>> Subject: Re: User based CF
>>
>> There is no such implementation. Literature suggests that an item-based
>> approach is usually both faster and more accurate.
>>
>> --sebastian
>>
>>
>> On 10.11.2011 08:34, WangRamon wrote:
>> >
>> >
>> >
>> >
>> > Hi All Dose mahout provide a user based CF implementation on Hadoop?
>> > Currently i only see an item based hadoop implementations. Thanks.
>> > CheersRamon
>>
>
--
*Vignesh Prajapati*
Tel: 9427415949 |
vignesh2066@gmail.com | www.vipras.com.co.in
MYTK [image: Facebook] <https://www.facebook.com/vigs143> [image:
Twitter]<http://twitter.com/#%21/vigs143> [image:
LinkedIn] <http://www.linkedin.com/pub/vignesh-prajapati/37/756/46a> [image:
about.me] <http://www.way4fun.tk><http://r1.wisestamp.com/r/landing?promo=7&dest=http%3A%2F%2Fwww.wisestamp.com%2Femail-install%3Futm_source%3Dextension%26utm_medium%3Demail%26utm_campaign%3Dpromo_7>
RE: User based CF
Posted by WangRamon <ra...@hotmail.com>.
Thanks Sebastian, can i assume that if there are more items than users, item based CF will be slow.
> Date: Thu, 10 Nov 2011 08:43:53 +0100
> From: ssc@apache.org
> To: user@mahout.apache.org
> Subject: Re: User based CF
>
> There is no such implementation. Literature suggests that an item-based
> approach is usually both faster and more accurate.
>
> --sebastian
>
>
> On 10.11.2011 08:34, WangRamon wrote:
> >
> >
> >
> >
> > Hi All Dose mahout provide a user based CF implementation on Hadoop? Currently i only see an item based hadoop implementations. Thanks. CheersRamon
>
Re: User based CF
Posted by Sebastian Schelter <ss...@apache.org>.
There is no such implementation. Literature suggests that an item-based
approach is usually both faster and more accurate.
--sebastian
On 10.11.2011 08:34, WangRamon wrote:
>
>
>
>
> Hi All Dose mahout provide a user based CF implementation on Hadoop? Currently i only see an item based hadoop implementations. Thanks. CheersRamon