Skip to main content

The Story behind Mainframe to Cloud Journey

Mainframe to cloud

Mainframe to CLOUD: Mainframe computing took off in the 1950s and gained much prominence through-out the 1960s. Corporations such as IBM (International Business Machines), Univac, DEC (Digital Equipment Corporation), and Control Data Corporation started developing powerful mainframe systems.

These mainframe systems mainly carried out number-crunching for scientists and engineers. The main programming language used was Fortran. Then in the 1960s, the notion of database systems was conceived and corporations developed database systems based on the network and hierarchical data models. The database applications at that time were written mainly in COBOL.

Cloud Vs Mainframe

In the 1970s, corporations such as DEC created the notion of mini-computers. An example is DEC's VAX machine. These machines were much smaller than the mainframe systems. Around that time, terminals were developed. This way, programmers did not have to go to computing centers and use punch cards for their computations. They could use their terminals and submit the jobs to the computing machines. This was a huge step forward. It was also during this time that languages such as C and operating systems such as UNIX were developed.

A significant development in the late 1970s was the emergence of the personal computer. This resulted in Apple Computers. Soon after, IBM developed its own personal computers. Microsoft developed the DOS operating system for these IBM machines. Powerful workstations were developed in the early 1980s by corporations such as Sun Microsystems, Apollo, and HP (Hewlett Packard). Database systems based on the relational data model were developed by corporations such as IBM and Oracle. By the mid-1980s, computers were poised to take over the world.

Distributed Computing

With the invention of the Internet by DARPA (Defense Advanced Research Projects Agency), networked systems gained momentum in the 1970s and the early products came out in the 1980s. Computers were networked together and were communicating with each other and exchanging messages through what is now known as email. Several applications were developed for these distributed systems. The idea was to utilize the resources and carry out a computation in multiple machines. The late 1980s also saw the emergence of parallel computing.

A computing paradigm that exploded in the early 1990s was the distributed object paradigm. Here, computers were encapsulated as objects. This way objects communicated with each other by exchanging messages. This work resulted in consortia such as the Object Management Group [OMG] to be formed. It was at this time that object-oriented languages such as Smalltalk and C++ rose to prominence.

Evaluation of WWW

In the early 1990s, one of the major innovations of the twentieth century was initiated and that was the World Wide Web (WWW). Tim Berners Lee, the inventor of the WWW was a programmer at CERN in Geneva, Switzerland. He started a project to support physicists sharing data. This project resulted in the WWW. Around the same time, programmers at the University of Illinois National Computing Center developed the MOSAIC browser. These two innovations resulted in ordinary people using the WWW to query and search for information. The late 1990s saw the emergence of several search engines such as Alta Vista and Lycos. Then two researchers from Stanford University started a company called Google that is now the largest web search company in the world. Java became one of the popular programming languages.

CLOUD Computing
  • Cloud application 
  • Cloud data layer 
  • Cloud storage layer 
  • Cloud operating system and hypervisor layer 

The late 1990s also saw what is now called the dot-com boom. Several companies that provided services were formed and this resulted in electronic commerce. However, the infrastructure technologies were not mature at that time and, as a result, many of these companies did not survive. In the late 1990s and early 2000s, the notion of web services based on the service paradigm was created. With the service technologies, better infrastructures were built for e-commerce. Corporations were providing services to the consumer based on the service paradigm.

Developments in services computing, distributed computing, and the WWW have resulted in cloud computing. The idea was to provide computing as a service just like we use electricity as a service. That is, a cloud service provider would provide different levels of service to the consumer. The service could be to use the cloud for computing, for database management, or for application support such as organizing one's finances.


Popular posts from this blog

The best 5 differences of AWS EMR and Hadoop

With Amazon Elastic MapReduce (Amazon EMR) you can analyze and process vast amounts of data. It does this by distributing the computational work across a cluster of virtual servers running in the Amazon cloud. The cluster is managed using an open-source framework called Hadoop.

Amazon EMR has made enhancements to Hadoop and other open-source applications to work seamlessly with AWS. For example, Hadoop clusters running on Amazon EMR use EC2 instances as virtual Linux servers for the master and slave nodes, Amazon S3 for bulk storage of input and output data, and CloudWatch to monitor cluster performance and raise alarms.

You can also move data into and out of DynamoDB using Amazon EMR and Hive. All of this is orchestrated by Amazon EMR control software that launches and manages the Hadoop cluster. This process is called an Amazon EMR cluster.

What does Hadoop do...

Hadoop uses a distributed processing architecture called MapReduce in which a task is mapped to a set of servers for proce…

Top 20 ultimate ETL Questions really good for interviews

How to print/display the first line of a file?  there are many ways to do this. However the easiest way to display the first line of a file is using the [head] command.  $> head -1 file. Txt no prize in guessing that if you specify [head -2] then it would print first 2 records of the file.  another way can be by using [sed] command. [sed] is a very powerful text editor which can be used for various text manipulation purposes like this.  $> sed '2,$ d' file. Txt how does the above command work?  The 'd' parameter basically tells [sed] to delete all the records from display from line 2 to last line of the file (last line is represented by $ symbol). Of course it does not actually delete those lines from the file, it just does not display those lines in standard output screen. So you only see the remaining line which is the 1st line.  how to print/display the last line of a file?  the easiest way is to use the [tail] command.  $> tail -1 file. Txt if you want to do it using…

5 Things About AWS EC2 You Need to Focus!

Amazon Elastic Compute Cloud (Amazon EC2) - is a web service that provides resizable compute capacity in the cloud. It is designed to make web-scale cloud computing easier for developers.
Amazon EC2’s simple web service interface allows you to obtain and configure capacity with minimal friction.

The basic functions of EC2... 
It provides you with complete control of your computing resources and lets you run on Amazon’s proven computing environment.Amazon EC2 reduces the time required to obtain and boot new server instances to minutes, allowing you to quickly scale capacity, both up and down, as your computing requirements change.Amazon EC2 changes the economics of computing by allowing you to pay only for capacity that you actually use. Amazon EC2 provides developers the tools to build failure resilient applications and isolate themselves from common failure scenarios. 
Key Points for Interviews:
EC2 is the basic fundamental block around which the AWS are structured.EC2 provides remote ope…