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From "Jakob Homan (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (GIRAPH-78) Be smarter about multiple instances of the same vertex
Date Sat, 12 Nov 2011 05:08:51 GMT
Be smarter about multiple instances of the same vertex
------------------------------------------------------

                 Key: GIRAPH-78
                 URL: https://issues.apache.org/jira/browse/GIRAPH-78
             Project: Giraph
          Issue Type: Improvement
            Reporter: Jakob Homan


In a graph such as 
{noformat}a -> b, z
b -> c, z
c -> a, z
...
z{noformat}
where vertices a,b,c and are hosted on one worker and z is hosted on another, it would be
good to cache instances of z so a,b,c all point at the same instance, rather than generating
multiple copies of the same remote vertex during vertex reading.  This is less important with
primitive types and the recent work done there, but very useful for more complex types.  Since
the vertex readers are in userland, it would be good to provide these facilities as a library
implementing users can access. ]

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