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On-premise versus the cloud.

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The digital landscape is evolving rapidly

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and businesses are increasingly leveraging technology

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to enhance their operations.

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Among the most significant advancements

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is the shift from traditional on-premise infrastructure

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to cloud-based solutions

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and more recently, hybrid models.

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In this lesson,

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we're going to discuss these concepts,

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highlighting the responsibility matrix,

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hybrid considerations,

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third party vendors

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and key considerations

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such as availability, resiliency,

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cost, responsiveness, scalability,

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ease of deployment,

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risk transference, patch availability,

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inability to patch,

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power and compute.

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First up, cloud computing.

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Cloud computing is the delivery of computing services

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over the internet

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including servers, storage, databases, networking,

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software analytics, and intelligence.

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This technology offers faster innovation,

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flexible resources and economies of scale.

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For example, Netflix leverages cloud computing

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to stream content to millions of users worldwide.

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Now, within cloud computing,

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there are a few concepts that you should be familiar with.

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It includes the responsibility matrix,

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third party vendors,

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and hybrid solutions.

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Responsibility matrix.

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In cloud computing, the responsibility matrix

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outlines the division of responsibilities

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between the cloud service provider and the customer.

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For instance, in an infrastructure as a service model,

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the provider is responsible for managing the infrastructure

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while the customer handles everything else

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including the operating system, middleware,

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runtime, data and applications.

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This always changes according to the model used

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and the contractual agreements

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between the service provider and the customer,

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but it's always an integral part of the agreement.

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Next up, third party vendors.

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Third party vendors play a crucial role in cloud computing.

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They provide specialized services

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that enhance the functionality, security,

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and efficiency of cloud solutions.

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These services range from cloud management tools,

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security solutions to data analytic tools.

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For example, Cloud Health by VMware

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provides cost management, governance, automation,

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and security for multi-cloud environments.

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The third concept they should be familiar with

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is hybrid solutions.

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Hybrid solutions combine on-premise infrastructure,

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private cloud services,

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and public cloud services.

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They allow businesses to move workloads

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between environments depending on their needs.

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When considering a hybrid solution,

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businesses must consider data security, compliance,

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interoperability and cost.

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They must ensure that sensitive data is protected,

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regulatory requirements are met,

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systems can communicate with each other,

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and the solution is cost-effective.

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For example, a healthcare organization might

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use a hybrid solution to manage its IT needs.

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The organization could host sensitive patient data

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on its on-premise servers

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to maintain high levels of control and security.

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This is crucial due to stringent regulations like HIPAA,

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or the Health Insurance Portability and Accountability Act,

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that mandate the protection of patient information.

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For less sensitive high volume tasks

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like email hosting or data analysis,

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organization could leverage cloud solutions.

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This allows them to scale the resources up or down

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based on demand and safe costs,

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infrastructure and maintenance.

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Next up, on-premise solutions.

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On-premise solutions refer to the computing infrastructure

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that is physically located on site at a business.

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The business is responsible for maintaining the hardware,

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software, and other resources.

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For instance, a small law firm might choose

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to keep all of its data and applications on premise due

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to the sensitive nature of the legal documents

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and client information it handles.

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The firm has a server room where all of the data

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is stored and managed.

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All software updates,

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security measures and system upgrades

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are handled in-house by the firm's IT department.

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This setup allows the firm to have complete control

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over its data,

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ensuring that sensitive information is not exposed

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to third party vendors,

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or potential breaches associated with cloud solution.

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It also allows for immediate access

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and control over their data,

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which can be crucial in a fast-paced legal environment.

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Now, there are a few key considerations

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that you should be aware of in the cloud computing world.

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These are availability, resilience, cost, responsiveness,

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scalability, ease of deployment, risk transference,

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ease of recovery, patch availability, inability to patch,

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power and compute.

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Availability refers to the system's ability

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to be accessed when needed.

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Cloud services often offer high availability

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due to the distributed nature,

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which means that they can continue to operate even

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if one data center experienced an outage.

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For example, Amazon Web Services or AWS

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offers service level agreements promising

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an annual uptime percentage of at least 99.99%

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for their Amazon S3 and Amazon EC2 services.

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This high level of availability ensures

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that businesses using these services can access their data

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and applications almost anytime.

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Next, resilience.

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Resilience is the system's ability to recover

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from failures and continue to function.

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Cloud services are inherently resilient

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due to their distributed and redundant infrastructure.

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For instance, Google's cloud platform, or GCP,

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cloud storage is designed to provide robust data resilience.

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Even in the event

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of a simultaneous failure of two data centers,

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data stored in the GCP's cloud storage

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is still accessible and safe.

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Next up, cost.

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While cloud services can reduce upfront costs,

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ongoing costs can add up.

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It's essential to consider both the immediate

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and the long-term costs of cloud adoption.

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For example, a startup might choose AWS's

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pay as you go model

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to avoid high upfront costs.

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However, as their usage grows, so do their costs.

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They might need to consider reserved instances

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or saving plans to reduce long-term costs.

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Next, responsiveness.

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Responsiveness refers to the speed

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at which the system can adapt to changes in demand.

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Cloud services are highly responsive

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allowing businesses to quickly scale resources up

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or down as needed.

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For instance, e-commerce site might use Microsoft

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Azure's auto-scaling feature to handle increased

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traffic during a sale.

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This ensures their site remains responsive,

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providing a smooth customer experience.

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Scalability.

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Scalability is the system's ability

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to handle increased workloads.

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Cloud services offer virtually unlimited scalability,

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allowing businesses to grow

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without worrying about the infrastructure limitations.

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Going back to the Netflix example from earlier,

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Netflix uses AWS to scale its streaming services

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to accommodate its growing user base,

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handling peak viewing times

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and expanding into new regions

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without investing physical infrastructure.

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Next, ease of deployment.

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Cloud services are generally easier to deploy

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than on-premise solutions.

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They don't require physical installation

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and can be set up in a matter of minutes or hours.

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For instance, a small business

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might use Shopify's cloud-based

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e-commerce platform to quickly set up an online store

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without needing technical expertise or physical servers.

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Next, risk transference.

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With cloud services,

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some risks are transferred to the provider.

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However, the customer is still responsible

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for securing their data and applications.

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To give an example,

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a company using Salesforce transfers the risk

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of CRM software maintenance

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and infrastructure security to Salesforce.

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However, the company is still responsible

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for user access, security, and data protection.

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Next, ease of recovery.

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Cloud services often offer easy data recovery

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and backup solutions,

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protecting businesses from data loss.

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A company using Dropbox

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for cloud storage can easily recover

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files deleted accidentally,

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protecting them from potential data loss.

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Next, patch availability.

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Cloud service providers regularly release patches

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to fix vulnerabilities.

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Customers do not have to worry

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about finding and applying these patches themselves.

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Microsoft regularly releases patches

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for its Office 365 suite.

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Customers receive these updates automatically,

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ensuring their software is always up to date and secure.

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Next, inability to patch.

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Sometimes businesses might not be able to apply patches

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due to compatibility issues

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or lack of control over the cloud environment.

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For example, a business using a legacy application

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in the cloud might not be able to apply a patch

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if it's not compatible

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with the older version of the software they're using.

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Next, power.

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For customers, one of the advantages of cloud computing is

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that they don't have to worry about power consumption.

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The cloud service provider takes care

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of all the infrastructure,

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including the power supply.

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This not only reduces costs for the customer,

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it also eliminates the need to manage power supply issues.

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And finally, compute.

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Compute and cloud computing refers to the amount

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of computational resources that a customer can use.

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This includes the number of CPUs,

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the amount of memory,

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and the type and size of storage.

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Cloud service providers offer a range

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of compute options to suit different needs.

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For instance, Amazon Web Services or AWS

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offers high variety

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of compute instances, from small, low-cost instances

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for simple tasks

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to high performance instances

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for compute intensive workloads.

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So remember, cloud computing offers flexibility,

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scalability, and cost effectiveness,

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but businesses must consider the division

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of responsibilities,

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third party vendors,

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and ongoing costs.

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On-premise solutions offer high levels

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of control and security,

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but they can be expensive

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and challenging to maintain and scale.

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Hybrid solutions offer flexibility and control,

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but businesses must consider data security,

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compliance, interoperability, and cost.

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Key considerations when choosing a solution

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include availability, resilience,

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cost, responsiveness, scalability,

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ease of deployment, risk transference, patch availability,

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inability to patch, power and compute.