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From Sean Owen <sro...@gmail.com>
Subject Re: Announcing Amazon Elastic MapReduce
Date Sat, 04 Apr 2009 01:43:36 GMT
Yes all cores are used and the heap is allowed to grow as large as
possible, and is utilized for speed.

On 4/3/09, Markus Weimer <markus@weimo.de> wrote:
> Hello,
>
> On 03.04.2009, at 16:59, Sean Owen wrote:
>
>> As a benchmark I ran the 10 million rating GroupLens data set, on a
>> high CPU
>> extra large instance. It generated recommendations for all 71K users
>> in
>> about 10 hours, costing a bit more than $8. That is a kind of worst
>> case;
>> you can recommend for only a subset of users or trade some accuracy
>> for
>> speed.
>
> Thanks for that benachmark data! Does taste make use of all of the
> cores and memory in the extra big instance?
>
> Cheers,
>
> Markus
>

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