Mailing-List: contact user-help@flink.apache.org; run by ezmlm
Precedence: bulk
Subject: Re: VertexUpdateFunction
To: user@flink.apache.org
References: <20170529092815.Horde.RboFL3-0rrZWb9uJHuSQ-Xs@mail.uni-leipzig.de>
 <bd7e86b6-c69f-4da7-3c9a-0d65c0f6813a@mailbox.org>
 <20170531141909.Horde.3FGVU_9HfQRWROLlzs2lsGZ@mail.uni-leipzig.de>
From: Martin Junghanns <m.junghanns@mailbox.org>
Message-ID: <fbae5e44-6a82-5e0e-687f-a80ff4f2937f@mailbox.org>
Date: Thu, 1 Jun 2017 08:45:50 +0200
MIME-Version: 1.0
In-Reply-To: <20170531141909.Horde.3FGVU_9HfQRWROLlzs2lsGZ@mail.uni-leipzig.de>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
Content-Language: en-US
archived-at: Thu, 01 Jun 2017 06:46:01 -0000

Hi Ali,

If you're talking about a Java Map and the constructor of your compute 
function, then your implementation is not really scalable.

Cheers,

Martin


On 31.05.2017 14:19, rostami@informatik.uni-leipzig.de wrote:
> Hi Martin,
>
> thanks for your answer..
> For the vertex degree, I passed a map (vertex_id -> degree) to the 
> constructor.
>
> Regards,
> Ali
>
> Zitat von Martin Junghanns <m.junghanns@mailbox.org>:
>
>> Hi Ali :)
>>
>> You could compute the degrees beforehand (e.g. using the 
>> Graph.[in|out|get]degrees()) methods and use the resulting dataset as 
>> a new vertex dataset. You can now run your vertex-centric computation 
>> and access the degrees as vertex value.
>>
>> Cheers,
>>
>> Martin
>>
>>
>> On 29.05.2017 09:28, rostami@informatik.uni-leipzig.de wrote:
>>> Hi,
>>>
>>> I want to write an iterative algorithm using Gelly (spargel), like:
>>>
>>> https://ci.apache.org/projects/flink/flink-docs-release-0.8/spargel_guide.html 
>>> My question is how I can access the actual vertex information like 
>>> the vertex degree (in- or outdegree)
>>> under the subclass of VertexUpdateFunction. A way is maybe to send 
>>> an instance of graph to the constructor.
>>> However, getting the degree for a vertex in each instance of this 
>>> subclass would be really inefficient.
>>>
>>> Thanks,
>>> Ali
>>>
>
>
>