Public Cloud: The Win-Win Choice for Businesses
The rise and adoption of the public cloud is one of the most important changes in the history ofenterprise computing.
Many companies are moving parts of their IT infrastructure to public cloud services because they are more elastic and easily scalable,more efficient and optimize resources.
What are public clouds?
A public cloud is a type of cloud computing in which a service provider builds computing resources available to users on the public Internet.
These resources may be accessible for free or access may be sold based on subscription-based or pay-per-use pricing models.
The public cloud provider owns and administers the data centers where customer workloads run.
Service providers, in this case, take responsibility for all hardware and infrastructure maintenance and provide high-bandwidth network connectivity to ensure fast access to applications and data.
Multi-tenant environments in the public cloud
Public cloud architectures are multi-tenant environments:users share a pool of virtual resources that are automatically prepared and assigned to individual tenants through aself-service interface.
This means that workloads from multiple tenants could run CPU instances running on a shared physical server at the same time.
However, the data of each cloud tenant is logically isolated from that of the other tenants.
Public Cloud Services
Today, a wide range of public cloud computingservices is available, which includes multiple offerings and service models.
Almost any service that does not require physical proximity to the hardware hosting it can now be delivered via the cloud.
Top Cloud Models
Infrastructure-as-a-Service (IaaS): In IaaS, the public cloud provider provides access to critical compute,networking, and storage resources on demand over the public Internet or through dedicated connections.
Platform-as-a-Service (PaaS):PaaS provides application developers with a complete platform,which includes all the necessary hardware, software, and infrastructure, on which applications can be built, run, and managed.
The entire infrastructure of the platform is typically managed by the cloud provider, and users don't have to worry about the lower-level details.
Software-as-a-Service (SaaS):With SaaS, users receiveaccess to software applications hosted in the cloud.
Instead of being installed on on-premises devices, these applications reside in the cloud and are accessible through a web browser or api.
The benefits of public cloud
In general, it is a better choice if:
You need scalability and elasticity,which is the ability to add capacity instantly or automatically in response to unexpected traffic spikes.
You want to avoid upfront expenses and prefer more predictable ongoing operating expenses.
You needunlimited access to particular resources available through a public cloud provider.
However, for highly specialized cybersecurity,regulatory, or infrastructure needs, a private cloud or a service similar to the private cloud might be your best bet.