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From Claudio Martella <>
Subject Re: MySQL Table
Date Fri, 06 Sep 2013 07:42:35 GMT
Hi Bu,

no, currently we do not have a DBInputFormat. We have an open issue with a
google summer of code student working on a GoraInputFormat, which supports
also reading from RDBMs through Gora. However, if/when it will get it, it
will not provide a rich semantic as DBInputFormat, e.g. you'll be able to
only provide scan-like/range queries, instead of ANY query like

I think that creating an DB[Vertex|Edge]InputFormat starting from the
hadoop DBInputFormat should not be too hard and could prove to be a very
useful contribution. If you think about providing an implementation, I can
provide guidance.


On Fri, Sep 6, 2013 at 1:45 AM, Bu Xiao <> wrote:

> Hi Girapher,
>        I am currently working on algorithm that requires reading the
> vertices from MySQL table and not from HDFS. I thought that there has to be
> a way of reading data from SQL table since Giraph is built on top of
> Hadoop. But I do not seem to figure this part out. Do you have a class
> similar to the DBInputFormat in Hadoop? Thank you very much for your help.

   Claudio Martella

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