Thank you a lot Konstantin, you cleared my mind.
So, Herriot is a framework designed to test Hadoop as a whole, and (IMHO) is
a tool for help Hadoop developers and not for who is developing MR programs,
but can we use Herriot to do unit, integration or other tests on our MR
jobs?
Do you know another test tool or test framework for Hadoop?
Thanks in Advance
--
Edson Ramiro Lucas Filho
{skype, twitter, gtalk}: erlfilho
http://www.inf.ufpr.br/erlf07/
On Wed, Feb 2, 2011 at 4:58 PM, Konstantin Boudnik <c...@apache.org> wrote:
> (Moving to common-user where this belongs)
>
> Herriot is system test framework which runs against a real physical
> cluster deployed with a specially crafted build of Hadoop. That
> instrumented build of provides an extra APIs not available in Hadoop
> otherwise. These APIs are created to facilitate cluster software
> testability. Herriot isn't limited by MR but also covered (although in
> a somewhat lesser extend) HDFS side of Hadoop.
>
> MRunit is for MR job "unit" testing as in making sure that your MR job
> is ok and/or to allow you to debug it locally before scale deployment.
>
> So, long story short - they are very different ;) Herriot can do
> intricate fault injection and can work closely with a deployed cluster
> (say control Hadoop nodes and daemons); MRUnit is focused on MR jobs
> testing.
>
> Hope it helps.
> --
> Take care,
> Konstantin (Cos) Boudnik
>
>
> On Wed, Feb 2, 2011 at 05:44, Edson Ramiro <erlfi...@gmail.com> wrote:
> > Hi all,
> >
> > Plz, could you explain me the difference between MRUnit and Herriot?
> >
> > I've read the documentation of both and they seem very similar to me.
> >
> > Is Herriot an evolution of MRUnit?
> >
> > What can Herriot do that MRUnit can't?
> >
> > Thanks in Advance
> >
> > --
> > Edson Ramiro Lucas Filho
> > {skype, twitter, gtalk}: erlfilho
> > http://www.inf.ufpr.br/erlf07/
> >
>
