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From "Dionysios Logothetis (Jira)" <>
Subject [jira] [Resolved] (GIRAPH-96) Support for Graphs with Huge adjacency lists
Date Tue, 12 May 2020 18:24:00 GMT


Dionysios Logothetis resolved GIRAPH-96.
    Resolution: Fixed

> Support for Graphs with Huge adjacency lists
> --------------------------------------------
>                 Key: GIRAPH-96
>                 URL:
>             Project: Giraph
>          Issue Type: Improvement
>          Components: bsp
>    Affects Versions: 0.1.0
>            Reporter: UNUSED
>            Priority: Major
> 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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