BIG QUERY: Analytics goooooooooogles way

I’ve been wondering how i forgot to write an article on Big Query. An year back when i heard the word “Big Query” from Google i felt these guys are planning to conquer the BIG DATA world as well. Its obvious because google showed the world GFS(google file system) and Mapreduce concepts,which gave birth to hadoop. HAIL GOOGLE.!!! for your innovation.
Coming back to GOOGLE BIG QUERY,it is a full fledge big data tool stored on the cloud.Google created this tool online where you can analyze your bigdata for a per use fee, similar to other cloud offerings.

Wanna practially see the Advantage of BIG Query ???
Yes ,you can see the demo based on 2 contexts WIKIPEDIA & Data from WEATHER STATIONS.
Try the Demo here

https://demobigquery.appspot.com

BIG DATA + ORACLE + HADOOP

This is my Idea and explanation to one of my colleague who asked me HOW TO USE ORACLE TECHNOLOGY WITH BIG DATA.

As you can see below, we can combine the open source technology HADOOP with Oracle Technologies.  I hope you can easily understand it 🙂

Map Reduce Program Error in Ubuntu

Some times while Running a Map Reduce Program may result in this kind of Error ,the reason is output directory exits already ,which means you have already run it some time before .

hduser@ubuntu:/home/hemanth/hadoop$ bin/hadoop jar hadoop-examples-1.0.4.jar pi 10 100
Warning: $HADOOP_HOME is deprecated.
Number of Maps = 10
Samples per Map = 100
java.io.IOException: Tmp directory
hdfs://localhost:54310/user/hduser/PiEstimator_TMP_3_141592654 already exists.
Please remove it first.
at org.apache.hadoop.examples.PiEstimator.estimate(PiEstimator.java:270)
at org.apache.hadoop.examples.PiEstimator.run(PiEstimator.java:342)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.examples.PiEstimator.main(PiEstimator.java:351)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:2
5)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:6
8)
at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
at org.apache.hadoop.examples.ExampleDriver.main(ExampleDriver.java:64)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:2
5)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.util.RunJar.main(RunJar.java:156)

I resolved this issue like this :

hduser@ubuntu:/home/hemanth/hadoop$ cd bin
hduser@ubuntu:/home/hemanth/hadoop/bin$ fs -rmr
hdfs://localhost:54310/user/hduser/PiEstimator_TMP_3_141592654
Warning: $HADOOP_HOME is deprecated.
Deleted hdfs://localhost:54310/user/hduser/PiEstimator_TMP_3_141592654

Now you run this Program ,you will get the out put