Cloud Computing : Architecture, Virtualization, SOA, and Big Data Technologies (Hadoop & HDFS)

This comprehensive video provides a deep understanding of cloud computing, defined as the delivery of various computing services, such as storage, databases, software, and networking, over the Cloud (Internet), offering a cost-effective alternative to maintaining an on-premises data centre. We explore the five essential characteristics of cloud computing, including On-demand self-services, where users manage resources without human administrators; Broad network access over standard networks; Rapid elasticity, which allows capabilities to scale quickly inward and outward; Resource pooling, where IT resources are shared among multiple clients; and Measured service, where resource utilization is tracked for monitoring and billing purposes.
The content details the major service models: Infrastructure as a Service (IaaS), where IT infrastructure (like servers and storage) is rented; Platform as a Service (PaaS), which provides an on-demand environment for developing, testing, and managing applications (such as Google App Engine); and Software as a Service (SaaS), which delivers centrally hosted software via the internet, often on a subscription basis. The underlying architectural models include Service-Oriented Architecture (SOA), a development method utilizing reusable software components called services, and REST (Representational State Transfer), an architectural style used to build web services.
A critical foundational technology is Virtualization, which creates a virtual layer over hardware, allowing multiple instances (like different operating systems) to run simultaneously on a single physical machine. Finally, the video covers Apache Hadoop, an open-source framework designed for distributed storage and parallel processing of massive datasets. Hadoop's core components are the Hadoop Distributed File System (HDFS), which stores data across multiple machines for high throughput and fault tolerance, and MapReduce, the programming model used for processing these large datasets in parallel across a cluster.
#CloudComputing #Virtualization #Hadoop #HDFS #MapReduce #SOA #REST #IaaS #PaaS #SaaS #CloudArchitecture #BigData #DistributedComputing
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