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From Pradeeban Kathiravelu <kk.pradee...@gmail.com>
Subject Re: Embedded Hazelcast for a distributed Drill cluster
Date Mon, 28 Mar 2016 19:56:03 GMT
Thanks Neeraja for your quick response.

May I know what replaced Hazelcast in that case?

I mean, how does Drill distributed mode currently offer the multicast and
subnet scenarios, or are these scenarios not valid anymore?

Regards,
Pradeeban.

On Mon, Mar 28, 2016 at 3:52 PM, Neeraja Rentachintala <
nrentachintala@maprtech.com> wrote:

> Its not currently used as far as I know.
> Drill used this at some point, but we removed it due to issues in
> multicast/subnet scenarios in Drill distributed mode.
>
> -Neeraja
>
> On Mon, Mar 28, 2016 at 12:49 PM, Pradeeban Kathiravelu <
> kk.pradeeban@gmail.com> wrote:
>
> > Hi,
> > [1] states that Drill uses Hazelcast as an embedded distributed cache to
> > distribute and store metadata and locality information.
> >
> > However, when I cloned the git repository and looked into the code, it
> does
> > not look like Hazelcast is used, except for some unused variable
> > definitions and pom definitions.
> >
> > I also found a resolved bug report on Hazelcast cluster membership [2].
> >
> > May I know whether Hazelcast is currently used by Drill, and what does
> > exactly Drill achieve by using it? Relevant pointers to existing
> > discussions (if this was already discussed) or code location (if this was
> > indeed implemented in Drill) are also appreciated.
> >
> > [1]
> >
> >
> http://www.slideshare.net/Hadoop_Summit/understanding-the-value-and-architecture-of-apache-drill
> > [2] https://issues.apache.org/jira/browse/DRILL-489
> >
> > Thank you.
> > Regards,
> > Pradeeban.
> > --
> > Pradeeban Kathiravelu.
> > PhD Researcher, Erasmus Mundus Joint Doctorate in Distributed Computing,
> > INESC-ID Lisboa / Instituto Superior Técnico, Universidade de Lisboa,
> > Portugal.
> > Biomedical Informatics Software Engineer, Emory University School of
> > Medicine.
> >
> > Blog: [Llovizna] http://kkpradeeban.blogspot.com/
> > LinkedIn: www.linkedin.com/pub/kathiravelu-pradeeban/12/b6a/b03
> >
>



-- 
Pradeeban Kathiravelu.
PhD Researcher, Erasmus Mundus Joint Doctorate in Distributed Computing,
INESC-ID Lisboa / Instituto Superior Técnico, Universidade de Lisboa,
Portugal.
Biomedical Informatics Software Engineer, Emory University School of
Medicine.

Blog: [Llovizna] http://kkpradeeban.blogspot.com/
LinkedIn: www.linkedin.com/pub/kathiravelu-pradeeban/12/b6a/b03

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