[jira] [Created] (GIRAPH-873) Specialized edge stores

["Craig Muchinsky (JIRA)" <ji...@apache.org>]

Craig Muchinsky created GIRAPH-873:
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             Summary: Specialized edge stores
                 Key: GIRAPH-873
                 URL: https://issues.apache.org/jira/browse/GIRAPH-873
             Project: Giraph
          Issue Type: Improvement
            Reporter: Craig Muchinsky


While doing some performance tuning I discovered that loading the edge store can be a very expensive operation. Similar to GIRAPH-704, the use of primitive maps can provide significant performance benefit. Part of the benefit comes with the lower memory overhead associated with the primitive maps however the larger benefit comes with the fact that you don't have to release and reconstruct the vertexId object every time a new vertex is encountered.

When processing a large graph with 4B vertices and 5B edges (3B of the edges loaded via EdgeInputFormat) the worker edge requests were taking ~15 seconds each, but after implementing the above suggestions that number dropped down sub-second.



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