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From ikapo...@csd.auth.gr
Subject Re: Aggregators in Graph API
Date Fri, 16 Aug 2013 18:25:05 GMT
Well to be honest I would like to know the more internal stuff if it  
wouldn't be
much of a burden to you. Thanks anyway!


Quoting andronat_asf <andronat_asf@hotmail.com>:

> In the end of every superstep (an some times before but let's keep  
> it simple) each aggregator is invoked and gets the value of each  
> vertex. Then all aggregators combine their status with 1 master  
> aggregator. On your next superstep you can read this aggregated  
> value from every vertex you have throughout the method  
> getLastAggregatedValue(0). (if you have more aggregators you will  
> need to change the number from 0 to an other).
>
> If you want more internal stuff of how those actually work please tell me :)
>
> Anastasis
>
> On 16 Αυγ 2013, at 2:13 μ.μ., ikapoura@csd.auth.gr wrote:
>
>> Hey Anastasis,
>>
>>   Yeah I did check it but I can't figure out their work. So at each  
>> superstep the aggregator takes the values of each node and calls  
>> the aggregate function for each of them? And then at the next  
>> superstep, we just call the getNextAggregatedValue with the index  
>> of the aggregator we want, to get the result we return from getValue?
>>
>> Ilias
>>
>>
>> Quoting andronat_asf <andronat_asf@hotmail.com>:
>>
>>> There is an example of Aggregators in PageRank example. Did you check it?
>>>
>>> Cheers,
>>> Anastasis
>>>
>>> On 15 Αυγ 2013, at 10:57 μ.μ., ikapoura@csd.auth.gr wrote:
>>>
>>>> Hello there,
>>>>
>>>> Sorry if my question is too naive but I cant find anything  
>>>> myself..! I want to use a test aggregator in the Graph API but I  
>>>> can't find how to call the aggregate function.. I can only see  
>>>> getLastAggregatedValue and getNumLastAggregatedVertices. I am  
>>>> also using hama-0.6.0.
>>>>
>>>> Any help appreciated!
>>>>
>>>>
>>>>
>>
>>
>>
>>




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