Thank you, Sean. That makes sense. It uses 1 second to generete 
recommendations. After intiating the recommender, the recommend() will be very 
fast. I just wondering if there are multiple requests per second, say 10 
requests,  does this work fine?



>OK, but these are not log messages from producing recommendations.
>This shows loading the data into memory the first time. It may take a
>little time, but, producing recommendations after that should be very
>fast.
>
>2010/7/13 WoodJustin <[email protected]>:
>>
>> i did not modify anything in the Mahout in Action. First new 
>> GroupLensDataModel, then PearsonCorrelationSimilarity and Neighborhood, and 
>> last generate the recommendation. And this the result
>>
>> 12:12:59
>> Info: Creating FileDataModel
>>
>> 12:13:01
>> Info: Reading file info...
>> ...
>> 12:14:59
>> Info: Processed 10000000 lines
>>
>> 12:14:59
>> Info: Read lines: 10000054
>>
>> 12:15:03
>> Info: Processed 69878 users
>>
>>
>>
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