cl2 History of Cloud Computing Evolution скачать в хорошем качестве

cl2 History of Cloud Computing Evolution

This video, titled "cl2" (likely referring to a lecture on Cloud Computing), provides a detailed historical overview of the technological developments that paved the way for modern cloud computing. Key Topics Covered: Mainframes and Early Sharing [02:05]: In the 1960s, computers were scarce and expensive. Efficiency was maximized through centralized management and "time-sharing" modes where multiple users accessed one central machine via terminals. The PC Revolution and Networking [04:26]: The 1980s shifted focus to individual ownership. However, the need to share printers and data led to the development of Local Area Networks (LANs) and the Client-Server model [07:01]. Supercomputers [07:58]: For tasks beyond a PC's capability, supercomputers used batch processing and queuing systems. The video tracks their performance evolution from Megaflops to Petaflops [09:32]. Distributed Programming [13:26]: Remote Procedure Call (RPC): Standardized how programs on different computers communicate by mimicking local function calls. Java RMI [15:47]: An object-oriented approach for platform-independent communication. Loosely vs. Strongly Coupled Systems [21:09]: Discusses the "domino effect" of errors in complex call chains and why the industry moved toward loosely coupled, asynchronous systems. Service-Oriented Architecture (SOA) [24:07]: Web Services: Initially used XML, SOAP, and WSDL to describe and find services online. RESTful Services [29:05]: A simpler, resource-oriented approach using standard HTTP (GET, POST) that eventually became the industry standard over XML-based services. Grid and Voluntary Computing [30:12]: Grid Computing: Aims to provide computing power like a utility (like electricity) by connecting distant supercomputers. Voluntary Sharing [34:55]: Projects like SETI@home and Folding@home allow individuals to donate their idle PC time for scientific research, such as finding extraterrestrial life or studying COVID-19 [38:02]. Utility Computing and Virtualization [38:24]: Utility Model: Paying for computing resources as a service (e.g., Sun Microsystems' $1 per CPU hour model). Virtualization [40:17]: Disconnecting software from hardware through Virtual Machines (VMs). This allows for better hardware utilization, easier backups, and significant cost savings [43:31].