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Tell Your Children to Learn Hadoop

Three years ago I would have told you to teach your kids WordPress, but that seems passé

I spent some time last week with several vendors and users of Hadoop, the formless data repository that is the current favorite of many dot coms and the darling of the data nerds. It was instructive. Moms and Dads, tell your kids to start learning this technology now. The younger the better.

I still know relatively little about the Hadoop ecosystem, but it is a big tent and getting bigger. To grok it, you have to cast aside several long-held tech assumptions. First, that you know what you are looking for when you build your databases: Hadoop encourages pack rats to store every log entry, every Tweet, every Web transaction, and other Internet flotsam and jetsam. The hope is that one day some user will come with a question that can’t be answered in any way other than to comb through this morass. Who needs to spend months on requirements documents and data dictionaries when we can just shovel our data into a hard drive somewhere? Turns out, a lot of folks.

Think of Hadoop as the ultimate in agile software development: we don’t even know what we are developing at the start of the project, just that we are going to find that proverbial needle in all those zettabytes.

Hadoop also casts aside the notion that we in IT have even the slightest smidgen of control over our “mission critical” infrastructure. It also casts aside that we turn to open source code when we have reached a commodity product class that can support a rich collection of developers. That we need solid n.1 versions after the n.0 release has been debugged and straightened out. Versions which are offered by largish vendors who have inked deals with thousands of customers.

No, no, no and no. The IT crowd isn’t necessarily leading the Hadooping of our networks. Departmental analysts can get their own datasets up and running, although you really need skilled folks who have a handle on the dozen or so helper technologies to really make Hadoop truly useful. And Hadoop is anything but a commodity: there are at least eight different distributions with varying degrees of support and add-ons, including ones from its originators at Yahoo. And the current version? Try something like 0.2. Maybe this is an artifact of the open source movement which loves those decimal points in their release versions. Another company has released its 1.0 version last week, and they have been at it for several years.

And customers? Some of the major Hadoop purveyors have dozens, in some cases close to triple digits. Not exactly impressive, until you run down the list. Yahoo (which began the whole shebang as a way to help its now forlorn search engine) has the largest Hadoop cluster around at more than 42,000 nodes. And I met someone else who has a mere 30-node cluster: he was confident by this time next year he would be storing a petabyte on several hundred nodes. That’s a thousand terabytes, for those that aren’t used to thinking of that part of the metric system. Netflix already has a petabyte of data on their Hadoop cluster, which they run on Amazon’s Web Services. And Twitter, Facebook, eBay and other titans and dot com darlings have similarly large Hadoop installations.

Three years ago I would have told you to teach your kids WordPress, but that seems passé, even quaint now. Now even grade schoollers can set up their own blogs and websites without knowing much code at all, and those who are sufficiently motivated can learn Perl and PHP online. But Hadoop clearly has captured the zeitgeist, or at least a lot of our data, and it poised to gather more of it as time goes on. Lots of firms are hiring too, and the demand is only growing. (James Kobielus, now with IBM, goes into more detail here.)

Cloudera has some great resources to get you started from knowing nothing about it: they claim 12,000 people have watched or participated in their training sessions. You can start your engines here.

Read the original blog entry...

More Stories By David Strom

David Strom is an international authority on network and Internet technologies. He has written extensively on the topic for 20 years for a wide variety of print publications and websites, such as The New York Times, TechTarget.com, PC Week/eWeek, Internet.com, Network World, Infoworld, Computerworld, Small Business Computing, Communications Week, Windows Sources, c|net and news.com, Web Review, Tom's Hardware, EETimes, and many others.

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