Archive for SQL in Hadoop tag

Orc O'Malley of the Yellow Elephant clan says LLAP

Owen O’Malley on the Origins of Hadoop, Spark and a Vulcan ORC

Owen O’Malley is one of the folks I chatted with at the last Hadoop Summit in San Jose. I already discovered the first time I met him that he was the big Tolkien geek behind the naming of ORC files, as well as making sure that Not All Hadoop Users Drop ACID. In this conversation, I learned that Hadoop and Spark are both partially his fault, about the amazing performance strides Hive with ORC, Tez and LLAP have made, and that he’s a Trek geek, too.

Holden Karau's audience at High Performance Spark preso at Data Day Texas

Interviews with Brilliant People on Hadoop and the Future of Big Data Tech

I have been doing some very cool interviews with brilliant people, usually at events like Strata + Hadoop World and Hadoop Summit. The intention is to use their brilliant thoughts so that I don’t have to take the extra time to come up with my own. Not to mention I get the bonus of learning new things, and getting the unique perspectives of folks who really know their stuff. Nothing like learning tech from the folks who literally wrote the book on it.

Hadoop Data Lake Balcony

Schema on Read vs Schema on Write and Why Shakespeare Hates Me

A couple of months ago, I found myself without a full time gig for the first time in decades, and I did a little freelance blogging. Being an overachiever, I wrote such a long post for Adaptive Systems Inc. that I broke it into two parts. The first part got published before I dove head first into documenting and unit testing a big Hadoop implementation. The second part got published last week.

It was interesting reading my opinions on the nature and comparative strengths of the various strategies and technologies from a few months ago. It had been long enough that I didn’t remember what I’d written. I got a kick out of comparing my perspective, now that I have some recent hands-on experience digging through Hive code, comparing query speed with ORC vs without, or with MapReduce vs Tez.

Hadoop Tez, Stinger's Baby

The Tragedy of Tez

Tez is one of the marvelous ironies of the fast moving big data and open source software space, a piece of brilliant technology that was obsolete almost as soon as it was released. In the second in my series of short posts on Hadoop data processing frameworks, I’ll look at the bouncing baby born of the Stinger Initiative, and point out where it’s ugly.

Water jet cutting patterns in steel

Hadoop Can’t Do That

I just got back from a little executive summit conference in Dallas for Chief Data Officers. Frustratingly, I heard a lot of folks telling me what Hadoop CAN’T do. Now, I know that Hadoop can’t bring about world peace or get my husband to put the toilet seat down, but the things people keep saying it can’t do are  things that I’ve personally DONE on Hadoop clusters, so I know they’re doable.

If you asked most people if water could cut through steel, they would probably tell you it can’t. They would be wrong, too.

In-Memory wave crests in-chip wave coming

In-Memory Analytic Databases are So Last Century

In an article written last year by an industry analyst that I respect, IDC’s Carl Olofson, he gave the impression that in-memory analytics are the wave of the future, the new paradigm for high performance analytic databases. He said, “embrace the new paradigm and plan for it.”

For once, I didn’t agree with him.

In-memory analytics are last decade’s revolution, or even last century’s. The wave of the future is something far faster, and far more revolutionary.


Not All Hadoop Users Drop ACID

In the age of businesses with data that lives on dozens or even hundreds of servers, expecting transactional integrity and data consistency and currency are old-fashioned notions. On Hadoop, you just have to settle for the new NoSQL standard of BASE and eventual consistency. That’s what they say. But, as usual, “they” are wrong. Not all Hadoop users have to drop ACID…

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