Unix/Linux Operating System

UNIX is a multitasking, Multiuser computer Operating System that exists in many variants.

The original Unix was developed at AT&T’s Bell Labs research center by Ken Thompson, Dennis Ritchie, and others. From the power user’s or programmer’s perspective, Unix systems are characterized by a modular design that is sometimes called the “Unix philosophy,”

Hadoop Vs Relational Database Management System

Hadoop or RDBMS? There are a lot of different opinions out there among these two technologies. Few people think Hadoop is a replacement of RDBMS, few say Hadoop is the future, and few thinks Hadoop have just got hype. So I have tried to find out what is the reality what Hadoop is really meant for.

HDFS Architecture

The Hadoop Distributed File System (HDFS) is a highly fault tolerant file system designed and optimized to be deployed on a distributed infrastructure established with a bunch commodity hardware. HDFS provides high throughput access to application data and is best suited for applications that have large data sets.

How to Find out Next and Previous Day of Week in Oracle

I have seen people writing number of lines of code to find out the date on a specific day in current or previous week, most often we need Friday the last working day of the week. We have a pretty simple way to find out in Oracle Queries.

Discovery of Hadoop

Back in the early 2000’s Dough Cutting was attempting to build an Open Source Search engine called Nutch. They were facing trouble managing their distributed system even when they were running on very few computers. Nutch was stuck with its two half time developers.