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https://issues.apache.org/jira/browse/FLINK-3771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15262173#comment-15262173
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ASF GitHub Bot commented on FLINK-3771:
---------------------------------------
Github user greghogan commented on the pull request:
https://github.com/apache/flink/pull/1900#issuecomment-215432236
We can't translate vertex or edge IDs without modifying both as long as we
want to return a `Graph`
Setting parallelism is critical to scaling Flink to large datasets which
doubles the function count.
`graph.run(new
TranslateEdgeValues<LongValue,LongValue,LongValue,StringValue>(new
LongValueToStringValue()))` is verbose due to the parameterization and we
should definitely try to find a way to improve that.
> Methods for translating Graphs
> ------------------------------
>
> Key: FLINK-3771
> URL: https://issues.apache.org/jira/browse/FLINK-3771
> Project: Flink
> Issue Type: New Feature
> Components: Gelly
> Affects Versions: 1.1.0
> Reporter: Greg Hogan
> Assignee: Greg Hogan
> Fix For: 1.1.0
>
>
> Provide methods for translation of the type or value of graph labels, vertex
> values, and edge values.
> Sample use cases:
> * shifting graph labels in order to union generated graphs or graphs read
> from multiple sources
> * downsizing labels or values since algorithms prefer to generate wide types
> which may be expensive for further computation
> * changing label type for testing or benchmarking alternative code paths
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