mapreduce: All content tagged as mapreduce in NoSQL databases and polyglot persistence
Eric Baldeschwieler’s keynote from HadoopSummit has been published on YouTube. It’s mainly about the goals and effort behind Hadoop 2.0 and the new tools in the Hadoop’s ecosystem meant to simplify different aspects of a Hadoop deployment (HCatalog, Ambary, Tez, Stinger Initiative).
✚ Datanami has published a summary of the keynote here
Original title and link: Hadoop Now, Next and Beyond - Keynote by Eric Baldeschwieler ( ©myNoSQL)
Speaking about the buzz around Dataguise’s field-level encryption for Apache Hadoop and their 10 best practices for securing sensitive data in Hadoop, after the break1, you can find the “Hadoop Security Design” paper written by a team at Yahoo.
I’m almost always enjoying the lessons learned-style presentations from Twitter’s people. The slides below, by Jimmy Lin and Dmitriy Ryaboy, have been used at HadoopSummit. Besides the technical and practical details, there are two things that I really like:
DJ Patil: “It’s impossible to overstress this: 80% of the work in any data project is in cleaning the data”
and then the reality check:
- Your boss says something vague
- You think very hard on how to move the needle
- Where’s the data?
- What’s in this dataset?
- What’s all the f#$#$ crap in the data?
- Clean the data
- Run some off-the-shelf data mining algorithm
- Productionize, act on the insight
- Rinse, repeat