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Is Big Data a Solution in Search of a Problem?

The trigger point of Big Data was when Google published its paper on the “Map-Reduce” algorithm

If you look at the predictions made for 2012, you will find a new entry which was not there last year. Be it Gartner, Forrester or McKenzie – “Big Data” finds a place in the prediction.

So, what is big data? Is it the next path breaking technology which will change everything or is it just a hype which will die down after sometime?

Let us take a realistic look at what the term big data mean and what problem it can solve.

What is "Big Data"?

(The Wikipedia page on Big Data is not that good. The clearest explanation I have found is from O’Reilly Radar – here is the link)

Here is a short explanation.

Big Data is the name given to the classes of technologies that needs to be used when your data volume becomes so much that the RDBMS technologies can no longer handle it.

Big data spans three dimensions (taken from this article of IBM):

  • Variety – Big data extends beyond structured data, including unstructured data of all varieties: text, audio, video, click streams, log files and more.
  • Velocity – Often time-sensitive, big data must be used as it is streaming in to the enterprise in order to maximize its value to the business.
  • Volume – Big data comes in one size: large. Enterprises are awash with data, easily amassing terabytes and even petabytes of information.

In short, if your data volume can be handled efficiently by RDBMS you NEED NOT worry about Big Data.

How did it all start?

With the advent of cloud computing which provided easy access to massive amount distributed computing power there was a realization RDBMS cannot be effectively parallelized. In fact CAP theorem states that Consistency, Availability & Partition Tolerance cannot simultaneously be guaranteed. This led to a No-SQL movement and multiple non-relational databases sprang up.

Trigger Point of Big Data happened when Google published the paper on the “Map-Reduce” algorithm. It involves processing of highly distributable problems across huge datasets using a large number of computers. Map-Reduce is at the heart of Google’s search engine.

Takeoff happened when Apache open source “Hadoop” project which created its own implementation of Map-Reduce. The largest Hadoop implementation is probably at Facebook.

In short: Big Data requires large DISTRIBUTED processing power.

Why would you want to process so much data?

There are 3 basic assumptions which are driving the big data movement:

  1. Faster analysis of larger operational data will help you make better decision
  2. More in-depth analysis of customer data will guide you to better customer segmentation
  3. Insight into larger data set will help you come up with innovative product design

Companies that have successfully leveraged this are Google, Facebook, Amazon, Walmart, Yahoo etc.

In short – the ASSUMPTION is that more data and faster analytics will lead to more innovation and better decision making.

Three Prerequisites for leveraging Big Data

Let us assume that your data volume is large enough and you have access to enough distributed processing power. Will that be sufficient for you to venture into big data?

No … you need three more things.

  1. Business problem which you think that the data at your disposal can help to resolve
  2. Set of questions to be answered through data analysis
  3. Algorithm to analyze the data – this is the domain of the new field Data Science

Big Data will be useful only if you are equipped with all these.

Therefore, for most of us, Big Data is a solution which is in search of a problem.

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More Stories By Udayan Banerjee

Udayan Banerjee is CTO at NIIT Technologies Ltd, an IT industry veteran with more than 30 years' experience. He blogs at http://setandbma.wordpress.com.
The blog focuses on emerging technologies like cloud computing, mobile computing, social media aka web 2.0 etc. It also contains stuff about agile methodology and trends in architecture. It is a world view seen through the lens of a software service provider based out of Bangalore and serving clients across the world. The focus is mostly on...

  • Keep the hype out and project a realistic picture
  • Uncover trends not very apparent
  • Draw conclusion from real life experience
  • Point out fallacy & discrepancy when I see them
  • Talk about trends which I find interesting

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