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List:       wekalist
Subject:    Re: [Wekalist] Weka 3-4-7
From:       Paul <paul.m.nz () gmail ! com>
Date:       2006-04-30 20:11:45
Message-ID: a5ed8b040604301311v22fb2464ncb1d7c35c4105f10 () mail ! gmail ! com
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Are you sure its the processor causing the improvements and not the
huge RAM increase???

/paul

On 4/29/06, Leibert, James <James.Leibert@state.mn.us> wrote:
>
>
> Hello:
> This is not a question and may not be new to anyone and if it has already
> been discussed - sorry in advance.
>
> I am using the M5P model tree, with 10 fold cross validation, on a moderate
> sized data set (15,000 cases with 51 variables) as a test before we move to
> a larger data set (120,000 cases with 200&#43 variables)  We are doing this
> test to see the advantages of switching to a dual core processor machine
> from a single processor.
>
> Weka version 3-4-7 took full advantage of the dual core machine.  The M5P
> tree, using 10 fold cross validation, was built in less than an hour and a
> half.  The first fold on the single processor has taken more than two and a
> half hours.  We expected some increase but nothing like this.
>
>
> Quick specs
> Dual core
> 3.4 gig processor, hyper threaded
> 4 gig RAM
>
> Single processor
> 3.2 gig processor
> 1.5 gig ram
>
> James Leibert, Ph.D.
> Research Scientist
> DHS- Disability Services Division
>
> 1.651.431.2373
>
>
> James.Leibert@state.mn.us
>
> "Without work, all life goes rotten-
> but if work is soulless,
> life stifles and dies." Albert Camus
>
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