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From "Arun Suresh (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (GIRAPH-96) Support for Graphs with Huge adjacency lists
Date Thu, 17 Nov 2011 15:12:51 GMT

     [ https://issues.apache.org/jira/browse/GIRAPH-96?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Arun Suresh updated GIRAPH-96:
------------------------------

          Component/s: bsp
    Affects Version/s: 0.70.0
    
> Support for Graphs with Huge adjacency lists
> --------------------------------------------
>
>                 Key: GIRAPH-96
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-96
>             Project: Giraph
>          Issue Type: Improvement
>          Components: bsp
>    Affects Versions: 0.70.0
>            Reporter: Arun Suresh
>
> Currently the vertex initialize() method is passed the complete adjacency list as a HashMap.
All the current concrete implementations of Vertex iterate over the adjacency list and recreate
new Data Structures within the Vertex instance to hold/manipulate the adjacency list. This
would seize to be feasible once the size of the adjacency list becomes really huge.
> I propose storing the adjacency list and all vertex information (and incoming messages
?) in a distributed data store such as HBase. The adjacency list can be lazily loaded via
HBase Scans. I was thinking of an HBase schema where the row Id is a concatenation of VertexID+OutboundVertexId
with a single column containing the edge.

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