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From "Sergey Edunov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (GIRAPH-895) Trim the edges in Giraph
Date Tue, 06 May 2014 17:07:14 GMT
Sergey Edunov created GIRAPH-895:
------------------------------------

             Summary: Trim the edges in Giraph
                 Key: GIRAPH-895
                 URL: https://issues.apache.org/jira/browse/GIRAPH-895
             Project: Giraph
          Issue Type: Improvement
          Components: graph
            Reporter: Sergey Edunov


In many Giraph applications, graphs are immutable, but edges are never trimmed to the proper
size, after input phase. This means that on average we often use 1.5x memory for storing them.
Considering we are often memory bounded, adding an option to trim the edges after the input
phase will help reduce this excess memory usage. For mutable graphs, we can also provide an
option for the same method to be called after each superstep.



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