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From Sergey Edunov <>
Subject Re: InMemoryVertex Format(s)
Date Wed, 03 Jun 2015 17:34:39 GMT
Hi Khaled,

As far as I know, InMemory input and output formats are only used in test
Can you elaborate more on why do you want to use I/O formats? You can use
different computation classes within one application and you don't need to
do I/O between them. All intermediate results can be kept in vertex and
edge data.

Sergey Edunov

On Tue, Jun 2, 2015 at 12:46 PM, Khaled Ammar <>

> Hi all,
> There are InMemory input and output format for giraph. These could be
> useful when a specific computation should be executed until convergence and
> then another computation is needed. Instead of writing intermediate results
> to HDFS and read it again, InMemoryVertex format sounds very convenient.
> However, I could not figure out how to use it in a proper Computation or
> GiraphBenchmark class.
> I appreciate if any one can share his/her experience using this format.
> *Link to the InMemoryVertexOutputFormat class :*
> --
> Thanks,
> -Khaled

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