Hadoop 101: Writing a Java MapReduce program

Learn what MapReduce is and how to implement it using Java.

Bio
Ian Wrigley is a Curriculum Manager at Cloudera. Cloudera is the leader in Apache Hadoop-based software and services.

Directions
From Granny White Pike turn on to Maryland Way heading East Take your first Left onto Arcaro Plaza Turn in to the first parking lot on the Right Take an immediate Left and park near the main entrance to the building We'll be in the Vaco offices on the first floor. If the doors are locked, look for a sign with a phone number, ring us and we'll let you in

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  • Ian W.

    Unfortunately, a chunk of the presentation was me waving my hands around explaining how MapReduce works. But you can now view the slides at http://www.slideshare.net/iwrigley/njug-presentation.

    2 · August 8, 2013

  • Csaba T.

    Slides please or I don't believe it! :)

    August 8, 2013

  • Tim P.

    Awesome presentation. Very clear, concise, and informationally dense. Two thumbs up!

    August 7, 2013

  • Rajeev P.

    I've been waiting for this since long time. something came up in last minute & couldn't make it :). did the presenter posted the presentation some where?

    August 7, 2013

  • Jeff S.

    Well done, Ian. Breaking down the processes made MapReduce really easy to grasp. The examples were well thought out and worked nicely.

    August 7, 2013

  • Ian W.

    Thanks, folks -- you're very kind. As far as data sets go: infochimps.com has a bunch (go to resources->data sets). And there's a huge amount of data at data.gov.

    August 7, 2013

  • Aaron W.

    Great speaker and very helpful content. Thanks Ian!

    August 7, 2013

  • Jonathan S.

    Outstanding presentation. I knew nothing about Hadoop going in and now am thinking of ways that we can implement it. Very impressed with the speaker and the presentation.

    August 7, 2013

  • Kenneth R.

    Great presentation, thanks.

    August 7, 2013

  • Daniel A.

    Great introduction to Hadoop and MapReduce.

    August 7, 2013

  • Daniel A.

    I know I can probably Google for some, but does anyone know of any data sets to use for practicing writing Map Reduce functions?

    August 6, 2013

  • Susan O.

    Excellent intro to Hadoop and other technologies. Presentation was very easy to follow. Thanks, Ian!

    August 6, 2013

  • Daniel A.

    Thanks Ian for the presentation. It was an awesome introduction to Hadoop and MapReduce. Now about that Nashville_50 code for training.....lol

    August 6, 2013

  • Csaba T.

    I'm very curious about the material (both presentation and code) what will be used during this meetup!

    August 3, 2013

    • Ian W.

      I'll let you know when I've finished writing the presentation... ;-)

      August 3, 2013

  • Ben

    I know this is off topic, it sounds like the topic is up in the air anyway. I'm looking at creating games using the unity3d engine and need a few JavaScript gurus to help. Non profit to start but would love to get something off of the ground to pay the bills. Let me know if game creation interests you and would like to use your JavaScript expertise towards games.

    August 1, 2013

  • Kerry W.

    Selenium-RC is what people around here are using. It has to launch a browser so the build is somewhat complicated to setup. We haven't gotten our's automated yet, but we do have some tests written. As for testing in our project in general, we typically we try to keep the non-Junit testable gwt stuff at the very tip of the sword. We have a very thin layer of GWT component stuff and the rest we use standard JUnit for. Anything that needs to be in the presenter layer we usually wrap in an interface so we can test it (ie, date format stuff).

    April 22, 2013

  • Tim P.

    Susan,

    Is there a reason you can't use JUnit for regression testing? Are you wanting to do integration tests? AFAIK regression testing is more a question of *what* you decide to test rather than *how* (with what framework) you decide to run the tests.

    Btw, feel free to start a new thread on the google groups site (https://groups.google.com/forum/?fromgroups#!forum/nashville-jug) on this topic. I find the forum format is a bit better suited to answering questions than the comment format.

    April 22, 2013

  • Susan O.

    I need get into regression testing, officially, for real. I write Java web applications (currently via Vaadin framework) for an internal community, so we've gotten away with minimal testing. But I'd like to change that. Recommendations for learning? Where do I start? Thanks.

    April 22, 2013

  • Kerry W.

    Unfortunately, Ian had something work related come up and we are going to have to reschedule this meetup. We'll post the new topic as soon as we get it sorted out.

    April 22, 2013

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