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https://issues.apache.org/jira/browse/GIRAPH-235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13408034#comment-13408034
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Harsh J commented on GIRAPH-235:
--------------------------------
I haven't spelunked very deep into Giraph's various examples but from what I
have seen, nothing seems to use a non-textual format so far. The text writer is
key/value class agnostic, but sequence file writer isn't and hence the fact
that Giraph doesn't configure Output Key/Value classes in config does not
impact the other record writers.
I think it should be fine to tweak context with the values of those vertex
classes for your sequence file output format purposes. Since Giraph does not
make use of the default output format channel anyway, this should be alright
(see BspRecordWriter comments and impl.).
To be safe, perhaps once the writer for your class has been created, you can
reset the context configuration to be its previous values.
> SequenceFile output format (id-value only)
> ------------------------------------------
>
> Key: GIRAPH-235
> URL: https://issues.apache.org/jira/browse/GIRAPH-235
> Project: Giraph
> Issue Type: New Feature
> Components: lib
> Reporter: Gianmarco De Francisci Morales
> Attachments: GIRAPH-235.1.patch
>
>
> Create a SequenceFileOutputFormat for the cases where compression is
> important and we only want the value of the vertex (e.g. pagerank)
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