Cloud Technology

Cloud computing is a model for ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources, such as servers, storage, networks, applications, and services. Resources can be rapidly provisioned with minimal management or service provider interaction. Self-service users launch instances as virtual machines, when needed, without
requiring assistance from the service provider. The cloud consumer decides the computing resources needed for their instances.

Cloud computing has several core characteristics:

1. Self-service: Allows cloud consumers to provision instances with computing resources.
2. Multitenancy: Allows multiple cloud consumers to share underlying hardware and resources.
3. Elasticity: Dynamically increases or decreases the resources used according to demand.
4. Telemetry: Resources can be monitored and metered by the service provider and the consumer

Types of cloud coumputing

Cloud computing is available in three forms: public, private, and hybrid clouds, offering different levels of security, management, and accessibility.

1. Public: Originally started as application hosting services, but has evolved to be applications, infrastructure, and data storage served by a third party vendor.

2. Private: On-premises data centres that include virtualization, software, and automation to build and manage infrastructure, feature-matching the public cloud, providing greater control over security, data privacy, and compliance, plus the flexibility of public cloud tools and capabilities.

3. Hybrid: Configuring both public and private cloud resources to be orchestrated together. Use cases include client facing apps on the public cloud connected to data storage in private cloud datacentres, or building apps that run on identical software infrastructure on both private and public, while responding to changes in demand by distributing capacity. Hybrid designs using open stack are being proven to be the highest flexibility and adaptability.