graph database

[Lin Chia-Hung <cl...@googlemail.com>]

I came across to read the following discussion

    http://markmail.org/message/ev24gg5khsgskxmx#query:+page:1+mid:jzhyxus53gpwe7sv+state:results

regarding to the graphic library. Does this indicate that `Angrapa'
may be similar to graph database?

>From what I have discovered so far, hama resembles to map/reduce and
data may store on e.g. hdfs or hbase
(http://www.mail-archive.com/hama-user@incubator.apache.org/msg00211.html).
So we can use graph database like neo4j to store graph data if
necessary.

However, in Angrapa (http://wiki.apache.org/hama/GraphPackage), it
refers that the lib consists of master and workers to compute the
data; this somehow seems to me the usage of hama in essence. So what
is the role of Angrapa? Or if a user/ developer decide to use hama as
framework to process social network data, what is the recommended arch
(e.g. hama + neo4j/ hdfs)?

Thanks.
Chiahung

Re: graph database

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

Hello,

Currently, we're working on BSP (Bulk Synchronous Parallel) computing
engine for large-scale matrix and graph problems, since we decided to
implement more generalized BSP computing solution instead of the
Angrapa, a Pregel-like graph-specific computing solution.

> framework to process social network data, what is the recommended arch
> (e.g. hama + neo4j/ hdfs)?

The hama-0.2 version doesn't provides input/output API. So, you may
want to connect to a remote database. I would recommend to use HBase,
at this time.

On Mon, Nov 22, 2010 at 3:07 PM, Lin Chia-Hung <cl...@googlemail.com> wrote:
> I came across to read the following discussion
>
>    http://markmail.org/message/ev24gg5khsgskxmx#query:+page:1+mid:jzhyxus53gpwe7sv+state:results
>
> regarding to the graphic library. Does this indicate that `Angrapa'
> may be similar to graph database?
>
> From what I have discovered so far, hama resembles to map/reduce and
> data may store on e.g. hdfs or hbase
> (http://www.mail-archive.com/hama-user@incubator.apache.org/msg00211.html).
> So we can use graph database like neo4j to store graph data if
> necessary.
>
> However, in Angrapa (http://wiki.apache.org/hama/GraphPackage), it
> refers that the lib consists of master and workers to compute the
> data; this somehow seems to me the usage of hama in essence. So what
> is the role of Angrapa? Or if a user/ developer decide to use hama as
> framework to process social network data, what is the recommended arch
> (e.g. hama + neo4j/ hdfs)?
>
> Thanks.
> Chiahung
>



-- 
Best Regards, Edward J. Yoon
edwardyoon@apache.org
http://blog.udanax.org