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Erik Gfesser

📍 Greater Chicago Area

New Book Review: "Spark: The Definitive Guide"

New book review for Spark: The Definitive Guide, by Bill Chambers and Matel Zaharla, O'Reilly 2018, reposted here: Copy provided by O'Reilly. Over the past few months, I've had the chance to work through three related books in the following order: "Spark: The

New Book Review: "Practical Hive"

New book review for Practical Hive: A Guide to Hadoop's Data Warehouse System, by Scott Shaw, Andreas Francois Vermeulen, Ankur Gupta, and David Kjerrumgaard, Apress, 2016: Shaw comments about the moment he experienced when he first copied a file into HDFS and created a Hive table on top

Media Query Source: Part 16 - InformationWeek (US digital magazine); Data silos: now and forever?

* InformationWeek (US digital magazine) * Data silo consolidation challenges & risks * Tight coupling between apps & data * Differing definitions of seemingly same data My responses ended up being included in an article at InformationWeek (November 13, 2018). Extent of verbatim quote highlighted in orange, paraphrased quote highlighted in gray. Above image

Media Query Source: Part 15 - The Modern Software Factory Hub (CA Tech blog); Debunking the 5 biggest DevOps myths

* The Modern Software Factory Hub (CA Tech blog) * Debunking 3 myths of DevOps * DevOps means dev & operations not separate * Reasons to adopt DevOps not limited to cost My responses ended up being included in an article at "The Modern Software Factory Hub" by CA Technologies (October 23,

Personal Reading List: 4Q2018

My personal reading list for October, November, and December 2018. Color Key: Special Notes, Completed Reading. Updated throughout the Quarter. At Bat (Schnell) Common Errors in Statistics and How to Avoid Them (Fourth Edition), by Phillip I. Good and James W. Hardin, Wiley, 2012. Practical Hive: A Guide to Hadoop&

Lowe's Event Log Issues

Looks like the Lowe's event log is having some issues: I received a delivery notice an hour ago for a new range that was already delivered 6 months ago. At first I thought that perhaps this was an inadvertently sent duplicate event, but in checking my own log

Media Query Source: Part 14

The responses I provided to a media outlet on August 9, 2018: Media: Customer-centricity, customer journeys, data as an asset. In a lot of cases, it's just lip service. The real reason companies aren't keeping their promises traces back to the data they have and don&

New Book Review: "High Performance In-Memory Computing with Apache Ignite"

New book review for High Performance In-Memory Computing with Apache Ignite, by Shamim Bhuiyan, Michael Zheludkov, and Timur Isachenko, Lulu.com, 2017, reposted here: If you're looking for a book that covers Apache Ignite, as of mid-2018 this is still the only one. And while working through this

Media Query Source: Part 13 - TechRepublic (US digital magazine); 8 hurdles IT must overcome if they want open source success

* TechRepublic (US digital magazine) * Open source hurdles that must be overcome * Commercial entities often behind open source * Due diligence should always be performed My responses ended up being included in an article at TechRepublic (August 16, 2018). Extent of verbatim quote highlighted in orange, paraphrased quote highlighted in gray. Above

The New Yorker Magazine as Test Data

Sometimes cartoons in The New Yorker provide an entertaining source of test data: in this case, yelp reviews (7/30/2018). But what kind of sentiment is being expressed when the product isn't even tried? I mean, these respondents could have at least provided some reasoning (other than