6 reasons your Big Data Hadoop project will fail in 2025
Ok so Hadoop is the bomb, Hadoop is the schizzle, Hadoop is here to solve world hunger and all problems.  Now I've talked before about some of the challenges around Hadoop for enterprises but here are six reasons that Information Week ...
Hadoop Cluster Interview Questions
Which are the three modes in which Hadoop can be run?
The three modes in which Hadoop can be run are:
1. standalone (local) mode
2. Pseudo-distributed mode
3. Fully distributed mode
What are the features of Stand alone (local) mode?
In stand-alone mode there are ...
Hadoop Resources
History of Hadoop
Spotlight on the early history of Hadoop
The history of Hadoop: From 4 nodes to the future of data
Big Ideas: Demystifying Hadoop
What is MapReduce?
"Cluster Computing and MapReduce Lecture" series in YouTube
http://www.youtube.com/watch?v=yjPBkvYh-ss
http://www.youtube.com/watch?v=-vD6PUdf3Js
http://www.youtube.com/watch?v=5Eib_H_zCEY
http://www.youtube.com/watch?v=1ZDybXl212Q
http://www.youtube.com/watch?v=BT-piFBP4fE
http://labs.google.com/papers/mapreduce.html
http://code.google.com/edu/parallel/mapreduce-tutorial.htmlÂ
What is Hadoop?
http://radar.oreilly.com/2012/02/what-is-apache-hadoop.html
http://gigaom.com/cloud/what-it-really-means-when-someone-says-hadoop
http://www.ibm.com/developerworks/data/library/techarticle/dm-1209hadoopbigdata/
What is HDFS?
The paper covers most of ...
Free Cloudera Impala Book
Get free Cloudera Impala, in PDF format, for free from the Cloudera website, in association with the Strata Conference and Hadoop World. See the below link for the book info from the publisher as well as the link to download ...
Hadoop Interview Questions – HDFS
Are you planning to pursue a career in Hadoop or looking out for a job opportunity in Hadoop? Here is list of Hadoop interview questions which covers HDFS
What is the difference between a Hadoop database and Relational Database?
Hadoop is not ...
Hadoop FS Shell Commands
Hadoop file system (fs) shell commands are used to perform various file operations like copying file, changing permissions, viewing the contents of the file, changing ownership of files, creating directories etc.
The syntax of fs shell command is
hadoop fs <args>
All the ...
Pig Interview Questions
Can you give us some examples how Hadoop is used in real time environment?
Let us assume that we have an exam consisting of 10 Multiple-choice questions and 20 students appear for that exam. Every student will attempt each question. For ...
Hadoop Cluster Commissioning and Decommissioning Nodes
To add new nodes to the cluster:
1. Add the network addresses of the new nodes to the include file.
hdfs-site.xml
<property>
<name>dfs.hosts</name>
<value>/<hadoop-home>/conf/includes</value>
<final>true</final>
</property>
mapred-site.xml
<property>
<name>mapred.hosts</name>
<value>/<hadoop-home>/conf/includes</value>
<final>true</final>
</property>
Datanodes that are permitted to connect to the namenode are specified in a
file whose name is specified by the dfs.hosts property.
Includes file ...