24/05/2024
Cloud computing & virtualization -
Cloud computing refers to the delivery of computing resources (such as servers, storage, databases, networking, software, and more) over the internet, on-demand, and with pay-as-you-go pricing. Instead of owning and maintaining physical hardware and software infrastructure, users access computing resources from cloud service providers who manage the underlying hardware and software infrastructure in remote data centers.
Key characteristics of cloud computing include:
On-Demand Self-Service: Users can provision and manage computing resources, such as server instances or storage, without human intervention from the service provider.
Broad Network Access: Cloud services are accessible over the internet from any device with network connectivity, enabling remote access and scalability.
Resource Pooling: Computing resources are pooled and shared among multiple users, with dynamic allocation based on demand. This enables economies of scale and efficient resource utilization.
Virtualization:
Virtualization is the process of creating virtual instances or representations of computing resources, such as servers, storage devices, networks, or operating systems, using software or hardware-based techniques. Virtualization decouples the physical hardware from the software, enabling multiple virtual instances to run independently on a single physical machine.
Key virtualization technologies include:
Server Virtualization: Server virtualization allows multiple virtual server instances to run on a single physical server, each isolated from the others and running its own operating system and applications. This improves hardware utilization and simplifies management and provisioning.
Storage Virtualization: Storage virtualization abstracts physical storage resources into logical pools, enabling centralized management, scalability, and data mobility across heterogeneous storage devices.
Network Virtualization: Network virtualization abstracts network resources, such as switches, routers, and firewalls, into virtual networks that operate independently of the underlying physical network infrastructure. This enhances network agility, flexibility, and security.
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