Dmitriy V. Ryaboy commented on GIRAPH-93:

Going through HCat will be a bit gnarly (though I agree with Jakob that it's 
the only sensible way when you are dealing with Hive-managed tables).  Writing 
to a directory and having Hive treat is a external will be far easier. Oh and 
Hive (and Pig) can read tab-delimited files, if it's just a matter of getting 
basic pipelining to happen initially.

Jakob, maybe we can discuss on the list, but starting a Giraph job from Pig 
should be as simple as a mapreduce invocation 
> Hive input / output format
> --------------------------
>                 Key: GIRAPH-93
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-93
>             Project: Giraph
>          Issue Type: New Feature
>            Reporter: Avery Ching
>            Assignee: Avery Ching
> It would be great to be able to load/store data from/to Hive tables.  

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