With all due to respect to the senior members of this site, I wanted to first congratulate Lokesh for his interest in Hadoop. I want to know how many fresh graduates are interested in this technology. I guess not many. So we have to welcome Lokesh to Hadoop world.
I agree to the seniors.......It is good and important to know the real world problems ....
But coming to your question - as per my knowledge - if u want to learn / shine in Hadoop - know the following compulsorily.
Seniors may correct me or add or modify to the following list.
From: Sanjay Subramanian <[EMAIL PROTECTED]>
To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>; "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
Sent: Thursday, May 23, 2013 11:03 PM
Subject: Re: Where to begin from??
I agree with Chris…don't worry about what the technology is called Hadoop , Big table, Lucene, Hive….Model the problem and see what the solution could be….that’s very important
And Lokesh please don't mind…we are writing to u perhaps stuff that u don't want to hear but its an important real perspective
To illustrate what I mean let me give u a few problems to think about and see how u would solve them….
1. Before Microsoft took over Skype at least this feature used to be there and the feature is like this……u type the name of a person and it used to come back with some search results in milliseconds often searching close to a billion names…….How would u design such a search architecture ?
2. In 2012, say 50 million users (cookie based) searched Macys.com on a SALES weekend and say 20,000 bought $100 dollar shoes. Now this year 2013 on that SALES weekend 60 million users (cookie based) are buying on the website….You want to give a 25% extra reward to only those cookies that were from last year…So u are looking for an intersection set of possibly 20,000 cookies in two sets - 50million and 60 million…..How would u solve this problem within milli seconds ?
3. Last my favorite….The Postal Services department wants to think of new business ideas to avoid bankruptcy…One idea I have is they have zillion small delivery vans that go to each street in the country….Say I lease out the space to BIG wireless phone providers and promise them them that I will mount wireless signal strength measurement systems on these vans and I will provide them data 3 times a day…how will u devise a solution to analyse and store data ?
I am sure if u look around in India as well u will see a lot of situations where u want to solve a problem….
As Chris says , think about the problem u want to solve, then model the solutions and pick the best one…
On the flip side….I can tell u it will still be a few years till many Banks and Stock trading houses will believe in Cassandra and Hbase for OLTP because that data is critical……If your timeline in Facebook does not show a photo , its possibly OK but if your 1 million deposit I a bank does not show up for days or suddenly vanishes - u r possibly not going to take that lightly…..
Ok enough RAMBLING….
From: Chris Embree <[EMAIL PROTECTED]>
Reply-To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
Date: Thursday, May 23, 2013 7:47 PM
To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
Subject: Re: Where to begin from??
I'll be chastised and have mean things said about me for this.
Get some experience in IT before you start looking at Hadoop. My reasoning is this: If you don't know how to develop real applications in a Non-Hadoop world, you'll struggle a lot to develop with Hadoop.
Asking what "things you need to know in compulsory" is like saying you want to "learn computers" -- totally worthless! Find a problem to solve and seek to learn the tools you need to solve your problem. Otherwise, your learning is un-applied and somewhat useless.
Picture a recent acting school graduate how to direct the next Star Wars movie. It's almost like that.
On Thu, May 23, 2013 at 10:39 PM, Lokesh Basu <[EMAIL PROTECTED]> wrote:
Also please tell me what are the things I compulsorily need to know before I dive into depth of these things.
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