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From Neeraja Rentachintala <nrentachint...@maprtech.com>
Subject Re: Embedded Hazelcast for a distributed Drill cluster
Date Mon, 28 Mar 2016 19:52:26 GMT
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 T├ęcnico, 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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