Loading binary file in Hama (with graph API)

[Jiwon Seo <ji...@stanford.edu>]

Hi,

I'm trying to understand how vertex loading is done in hama.

The part that I don't understand is, the relation between VertexInputReader
and InputFormat.

As far as I understand, VertexInputReader.parseVertex is the method to
initialize each vertex, but it is not clear where the function is called in
Hama 0.6.1.
In Hama 0.6.0, the parseVertex function is explicitly called inside
GraphJobRunner::loadVertices, but in Hama 0.6.1, it is replaced with
peer.readNext(vertex, NullWritable.get()), and parseVertex does not seem to
get called. Where is the function called?

Thanks,

-Jiwon

Re: Loading binary file in Hama (with graph API)

["Edward J. Yoon" <ed...@apache.org>]

Hi Mr.Seo,

Please look at VertexInputReader.convertRecord() method. see also
PartitioningRunner and RecordConverter classes[1].

1. http://svn.apache.org/repos/asf/hama/trunk/core/src/main/java/org/apache/hama/bsp/PartitioningRunner.java

On Fri, May 3, 2013 at 5:49 PM, Jiwon Seo <ji...@stanford.edu> wrote:
> Hi,
>
> I'm trying to understand how vertex loading is done in hama.
>
> The part that I don't understand is, the relation between VertexInputReader
> and InputFormat.
>
> As far as I understand, VertexInputReader.parseVertex is the method to
> initialize each vertex, but it is not clear where the function is called in
> Hama 0.6.1.
> In Hama 0.6.0, the parseVertex function is explicitly called inside
> GraphJobRunner::loadVertices, but in Hama 0.6.1, it is replaced with
> peer.readNext(vertex, NullWritable.get()), and parseVertex does not seem to
> get called. Where is the function called?
>
> Thanks,
>
> -Jiwon



-- 
Best Regards, Edward J. Yoon
@eddieyoon