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From "Edward J. Yoon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HAMA-767) [GSoC 2013] Vertex addition and removal
Date Wed, 26 Jun 2013 01:32:19 GMT

    [ https://issues.apache.org/jira/browse/HAMA-767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13693568#comment-13693568
] 

Edward J. Yoon commented on HAMA-767:
-------------------------------------

{quote}
1) I have some concerns about the partitioner. At this point, the partitioner will always
return to me correct peer. But the case is not the same if we have a random or probabilistic
partitioner. Should I keep in mind a use case like that?
{quote}

Nope, I don't think that's necessary. Because the graph update operations fundamentally requires
communications and synchronizations between processors in distributed environment. 

{quote}
2) When I delete a vertex, should I return their value and edges? (To do that the deleted
vertex will have to send a message on the next super step, and I believe that will be confusing).
{quote}

I'm not sure, exactly... Why do you think it should be returned to User?

{quote}
3) On ListVertecesInfo interface, we will have to force implement a remove method. I want
to also enforce this method to return an exception when the vertex is not there. Which is
the exception that will match the best? Currently I'm using UnsupportedOperationException.
{quote}

Let's create our own VertexNotFoundException class.

                
> [GSoC 2013] Vertex addition and removal
> ---------------------------------------
>
>                 Key: HAMA-767
>                 URL: https://issues.apache.org/jira/browse/HAMA-767
>             Project: Hama
>          Issue Type: New Feature
>          Components: examples, graph
>    Affects Versions: 0.6.1
>            Reporter: Anastasis Andronidis
>            Assignee: Anastasis Andronidis
>              Labels: dynamic, graph, gsoc, gsoc2013, mentoring
>             Fix For: 0.6.3
>
>         Attachments: HAMA-767-addAndRemove-v1.patch, HAMA-767-addition-v1.patch, HAMA-767-examplesAndTests-v1.patch
>
>
> Implement addVertex and removeVertex methods for incremental graph support on Graph API.

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