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From Cristina Bovi <>
Subject Re: Is it correct that master runs on a datanode?
Date Sun, 02 Sep 2018 20:30:39 GMT
I apologize again for my trivial question. I understood that hadoop/giraph
works creating containers on datanodes. Hadoop creates a container for
application master, then giraph creates a container for the master.
Furthermore giraph creates a number of container for workers corresponding
to -w parameter.

Il giorno gio 30 ago 2018 alle ore 15:50 Cristina Bovi <>
ha scritto:

> I'm using giraph-1.3 built with yarn profile. For starting I configured 1
> namenode and 2 datanodes on a ec2 cluster.
> My application properly works, I launched giraph with -w 2 because I have
> two datanodes.
> In userlogs of datanode1 I found log of first worker.
> in userlogs of datanode2 I found log of second worker and log of master
> too.
> I expected to find log of master in the namenode i.e. I expected that
> master runs on namenode. Is it right?
> Maybe I have to configure another datanode and then I will find master
> logs on this new datanode?
> --
> Cristina Bovi

Cristina Bovi

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