Re: Way to find the worker id of a given vertex id

[Thomas Karampelas]

Thanks for the reply.

I am working on the scope of an extention of the BasicComputationClass 
(let's say SimpleShortestPathsComputation).
It seems to me that from there I don't have access to an object having 
the accessor that you've mentioned(*getVertexPartitionOwner 
<https://giraph.apache.org/apidocs/org/apache/giraph/worker/BspServiceWorker.html#getVertexPartitionOwner%28I%29>*(I 
<https://giraph.apache.org/apidocs/org/apache/giraph/worker/BspServiceWorker.html> vertexId)) 
without changing things on existing classes.

Is there anything that I'm missing or should I mess around on existing 
classes to make it doable?

Thanks,
Thomas

On 22/09/2015 09:54 πμ, Flavian Jacquot wrote:
Hi,

A solution would be to be to get the partition owner and then get the 
worker info.
You can use *getVertexPartitionOwner 
<https://giraph.apache.org/apidocs/org/apache/giraph/worker/BspServiceWorker.html#getVertexPartitionOwner%28I%29>*(I 
<https://giraph.apache.org/apidocs/org/apache/giraph/worker/BspServiceWorker.html> vertexId) 
from HashWorkerPartitioner. There are other classes who also have this 
function. Once you get the *PartitionOwner 
<https://giraph.apache.org/apidocs/org/apache/giraph/worker/BspServiceWorker.html#getVertexPartitionOwner%28I%29> you 
can get the WorkerInfo.*
*
*
*Hope it helps.*
*
*
*Flavian*

2015-09-21 20:00 GMT+02:00 Thomas Karampelas <tkar...@di.uoa.gr 
<mailto:tkar...@di.uoa.gr>>:

    Hi,

    Is there a way to find the worker id of a vertex, given a vertex id?
    I saw this [1] and I get that by calling
    getWorkerContext().getMyWorkerIndex() it is possible to get
    current vertex's worker id.
    But is it possible to find the worker ids of all its neighbour
    vertexes at that point?


    [1]
    
http://mail-archives.apache.org/mod_mbox/giraph-user/201411.mbox/%3CD09E3112.27FA%25kiran.garimella%40aalto.fi%3E


    Thanks,
    Thomas