Hadoop 2.6.0 Multi-Node cluster setup

I have assumed that 10.0.1.1 is my Master Node and 10.0.1.2 and 10.0.1.3 are my slaves.Now ultimately we need to assign following roles.

10.0.1.1 NameNode, DataNode  
10.0.1.2 DataNode  
10.0.1.3 DataNode

First Master node : 10.0.1.1


$ cd $HADOOP_HOME
$ mkdir -p hdfs-data
$ mkdir -p hdfs-site
$ cd etc/hadoop
$ sudo gedit hdfs-site.xml

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Hadoop 2.6.0 Single Node Setup (pseudo-distributed mode)

Hadoop is one of the most popular tool or framework for Big Data today. Usually people say that setting up Hadoop is difficult but it isn’t so. So first we need to check whether java is there or not.


$ java -version

It should show something like : java version “1.6.0_65” Java(TM) SE Runtime Environment (build 1.6.0_65-b14-466.1-11M4716) Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-466.1, mixed mode) If you don’t see something like this then you need to install java first.


$ sudo apt-get install default-jre
$ sudo apt-get install openjdk-7-jdk
$ sudo apt-get install openssh-server
$ sudo apt-get install rsync

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Nvidia: Consoles to have better graphics than PCs? Pssh

The possibility of consoles topping PCs in graphical fidelity is nil, according to Nvidia.

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Speaking to Australia’s PC Power Play in an interview posted recently, Tony Tamasi, Nvidia senior vice president of content and technology, said that “it’s no longer possible for a console to be a better or more capable graphics platform than a PC.”

“Nvidia spends $1.5 billion per year Continue reading

Samsung Follows Apple, this time with Gold Galaxy S4

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Samsung is taking a page from Apple with the introduction of a gold version of its Galaxy S4 smartphone.

“Introducing the new #GalaxyS4 Gold Edition – for a style that’s uniquely yours!” Samsung said on its Saudi Arabia Twitter feed. “Elegance is a touch of gold,” reads the tagline above a photo of a pink S4 edged in gold. Continue reading

iPhone 5S, iPhone 5C and iOS 7 Reviews from big guys

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The reviews for the latest Apple devices and software are out.

Reviewers, journalists, and critics alike have ripped the foundations and fundamentals of Apple’s latest creations — the premium iPhone 5s, the low-cost iPhone 5c, and the next-generation iOS 7 software — and given their verdict.

Here are snippets of some of the other reviews from around the Web late on Tuesday:

iPhone 5s

AnandTech’s Anand Lal Shimpi gave a deep and thorough 13-page review of the premium Apple smartphone. The highest praise fell on the hardware features, notably the Apple A7 processor and M7 motion controller, which was described as “futureproof.” But some criticism fell in what Apple missed out, like as a slightly larger display, which in his view had “room for another sweet spot above 4-inches.”

While I don’t believe the world needs to embrace 6-inch displays, I do feel there is room for another sweet spot above 4-inches. […] If you prefer iOS for your smartphone — the iPhone 5s won’t disappoint. In many ways it’s an evolutionary improvement over the iPhone 5, but in others it is a significant step forward.  Continue reading