Bloom Filters in HBase and Chrome
Bloom Filters allows to efficiently check if a particular element/record is there in the set/table or not. It has very minimal impact on the insert operations. The only caveat is that it might return a false positive, Bloom filter might ...
16 Top Big Data Analytics Platforms
Revolutionary. That pretty much describes the data analysis time in which we live. Businesses grapple with huge quantities and varieties of data on one hand, and ever-faster expectations for analysis on the other. The vendor community is responding by providing ...
How to Get the Best Out of Big Data Solutions
Data has become the new raw material for businesses. And that’s how it should be in order to meet the dynamic needs of the current age. Thus, access to considerably large amounts of data and information always helps an organisation ...
Top 10 Big Data Trends in 2014
In January 2014, IDG published their latest big data enterprise survey and predictions for 2014 finding that on average, enterprises will spend $8M on big data –related initiatives in 2014. The study also found that 70% of enterprise organizations have ...
5 Keys to Big Data Success
As Big Data becomes more pervasive throughout farming, it’s important to understand what farmers need to make data collection and analysis successful, says John Fulton, Extension specialist at Auburn University.
"For many, there is no clear incentive or objective about the ...
When to use Pig Latin versus Hive SQL?
Once your big data is loaded into Hadoop, what’s the best way to use that data? You’ll need some way to filter and aggregate the data, and then apply the results for something useful. Collecting terabytes and petabytes of web ...
Introduction to Impala
Impala in terms of Hadoop has got the significance because of its,
Scalability
Flexibility
Efficiency
What’s Impala?
Impala is…
Interactive SQL–Impala is typically 5 to 65 times faster than Hive as it minimized the response time to just seconds, not minutes.
Nearly ANSI-92 standard and compatible with ...
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 ...
Data Export from Hadoop MapReduce to Database
Hadoop has become a huge part of Data Warehouse in most companies. It is used for a variety of use-cases: Search and Web Indexing, Machine learning, Analytics and Reporting, and so on. Most organizations are building Hadoop clusters in addition ...
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 ...