![]() Infrastructure as a Service (IaaS) – this is also known as HaaS (Hardware as a service). There are 3 types of representations w.r.t. It helped to build agile infrastructure, ensured high availability and reliability, scalability by on demand provisioning of resources as per business need, allowed multi-sharing, devices are location independent and users can connect from anywhere, low cost of ownership and services availability like a utility with pay per use made it an attractive preposition for organizations. The cloud works in distributed model and allows sharing of computing resources across users. The data can be in any form – files, images, videos, Audio and so on. Cloud computing allows remote servers hosted on Internet to manage, store, process, and access data online instead of stored locally on disks. In 2009 Microsoft launched Windows Azure About Cloud ComputingĬloud refers to Internet or a Network. In 2009 Google APPS also started offering Enterprise applications based on cloud infrastructure. In 2002, started its Amazon web series and started providing services like storage, computation power and AI (Artificial Intelligence) and launched Elastic Compute Cloud in 2006 but not much progress made on this thought which was again took a shape in 1991 when started delivery of applications to users over Internet / website. ![]() John M MacCharty in 1961 during a speech in MIT that computing resources or power can be sold as a utility like electricity, water etc. With the advent of distributed computer architecture, the systems were networked and sharing of resources (CPU, Memory, disk etc.) started which gave emergence to Cloud computing. Mainframes was a client/server architecture-based system where all software applications, data, processing power, memory and controls were centralized or resided on server side. Mainframes have been used for applications such as Payroll management, accounting, business transactions, information access and retrieval, airline reservations, scientific and engineering computations. Mainframe computers were characterised by – large size, high processing power and had multiple peripherals attached to them. Mainframe computers are also referred as ‘Big iron’ is used by large organizations for critical applications, data processing in bulk, supported massive throughput, hot swapping of hardware such as hard disks and memory, backward compatibility to older hardware, extensive Input/Output facilities, operated in batch mode, Virtualization and so on. The systems IBM/360 further developed into system/370, system/390 in addition to 64-bit series, z/z Enterprise machines. IBM 700/7000 series of mainframes dominated the market these were based on vacuum tubes for data storage which was later replaced by IBM /360 which was compatible model across and used for commercial and scientific operations. Over period size of mainframes reduced in 1960s the mainframes are majorly used in US military and space programs and by large industries. In 1998s Linux based operating systems have replaced Mainframes native OS. Initially data was stored on Vacuum tubes but later it is replaced by core memory which stored data magnetically using 5400-RPM disk and COBOL was the first language which was used for programming on mainframe systems. This mainframe was invented by Sir Howard Aiken teacher in Harvard to build a large-scale calculator to solve non liner equations.ĮNIAC The next famous Mainframe build during World War II by government funds. The era of Mainframe dates to 1930s when the first mainframe came into existence named as ‘Harvard Mark’ it was bulk in size weighted five tons, taken up entire room space and costed about $200,000 to build. Today, we look at two technologies that governed or decided the course and future of digitization – Mainframes and Cloud Computing. Centralized architecture with high computing power and centralization of computing resources vs distributed computing architecture are two main directions in which IT technology has moved or progressed with the passing time.
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