What is cloud computing?2021-03-19 19:57:00What is cloud computing? Have you ever wondered what cloud computing is? It's the delivery of computing services over the internet, which is otherwise known as the cloud. These services include ...
What is cloud computing?
Have you ever wondered what cloud computing is? It's the delivery of computing services over the internet, which is otherwise known as the cloud. These services include servers, storage, databases, networking, software, analytics, and intelligence. Cloud computing offers faster innovation, flexible resources, and economies of scale.
Why is cloud computing typically cheaper to use?
Cloud computing is the delivery of computing services over the internet by using a pay-as-you-go pricing model. You typically pay only for the cloud services you use, which helps you:
- Lower your operating costs.
- Run your infrastructure more efficiently.
- Scale as your business needs change.
To put it another way, cloud computing is a way to rent compute power and storage from someone else's datacenter. You can treat cloud resources like you would your resources in your own datacenter. When you're done using them, you give them back. You're billed only for what you use.
Instead of maintaining CPUs and storage in your datacenter, you rent them for the time that you need them. The cloud provider takes care of maintaining the underlying infrastructure for you. The cloud enables you to quickly solve your toughest business challenges, and bring cutting-edge solutions to your users.
Why should I move to the cloud?
The cloud helps you move faster and innovate in ways that were once nearly impossible.
In our ever-changing digital world, two trends emerge:
- Teams deliver new features to their users at record speeds.
- Users expect an increasingly rich and immersive experience with their devices and with software.
Software releases were once scheduled in terms of months or even years. Today, teams release features in smaller batches that are often scheduled in days or weeks. Some teams even deliver software updates continuously--sometimes with multiple releases within the same day.
Think of all the ways you interact with devices that you couldn't do a few years ago. Many devices can recognize your face and respond to voice commands. Augmented reality changes the way you interact with the physical world. Household appliances are even beginning to act intelligently. These technologies are only a few examples, and many of them are powered by the cloud.
To power your services and deliver innovative and novel user experiences more quickly, the cloud provides on-demand access to:
- A nearly limitless pool of raw compute, storage, and networking components.
- Speech recognition and other cognitive services that help make your application stand out from the crowd.
- Analytics services that deliver telemetry data from your software and devices.
What are some cloud computing advantages?
There are several benefits that a cloud environment has over a physical environment. For example, cloud-based applications employ a myriad of related strategies:
Reliability: Depending on the service-level agreement that you choose, your cloud-based applications can provide a continuous user experience with no apparent downtime even when things go wrong.
Scalability: Applications in the cloud can be scaled in two ways, while taking advantage of autoscaling:
- Vertically: Computing capacity can be increased by adding RAM or CPUs to a virtual machine.
- Horizontally: Computing capacity can be increased by adding instances of a resource, such as adding more virtual machines to your configuration.
Elasticity: Cloud-based applications can be configured to always have the resources they need.
Agility: Cloud-based resources can be deployed and configured quickly as your application requirements change.
Geo-distribution: Applications and data can be deployed to regional datacenters around the globe, so your customers always have the best performance in their region.
Disaster recovery: By taking advantage of cloud-based backup services, data replication, and geo-distribution, you can deploy your applications with the confidence that comes from knowing that your data is safe in the event that disaster should occur.
What are cloud service models?
Cloud computing falls into one of the following computing models. If you've been around cloud computing for a while, you've probably seen the terms infrastructure as a service (IaaS), platform as a service (PaaS), and software as a service (SaaS) for the different cloud service models. These models define the different level of shared responsibility that a cloud provider and cloud tenant are responsible for.
What are cloud service models? Computing model Description IaaS This cloud service model is the closest to managing physical servers. A cloud provider keeps the hardware up to date, but operating system maintenance and network configuration is left to the cloud tenant. For example, Azure virtual machines are fully operational virtual compute devices running in Microsoft's datacenters. An advantage of this cloud service model is rapid deployment of new compute devices. Setting up a new virtual machine is considerably faster than procuring, installing, and configuring a physical server. PaaS This cloud service model is a managed hosting environment. The cloud provider manages the virtual machines and networking resources, and the cloud tenant deploys their applications into the managed hosting environment. For example, Azure App Services provides a managed hosting environment where developers can upload their web applications without having to deal with the physical hardware and software requirements. SaaS
In this cloud service model, the cloud provider manages all aspects of the application environment, such as virtual machines, networking resources, data storage, and applications. The cloud tenant only needs to provide their data to the application managed by the cloud provider. For example, Office 365 provides a fully working version of Office that runs in the cloud. All that you need to do is create your content, and Office 365 takes care of everything else.
The following chart illustrates the various levels of responsibility between a cloud provider and a cloud tenant.
What is serverless computing?
Overlapping with PaaS, serverless computing enables developers to build applications faster by eliminating the need for them to manage infrastructure. With serverless applications, the cloud service provider automatically provisions, scales, and manages the infrastructure required to run the code. Serverless architectures are highly scalable and event-driven. They use resources only when a specific function or trigger occurs.
In understanding the definition of serverless computing, it's important to note that servers are still running the code. The serverless name comes from the fact that the tasks associated with infrastructure provisioning and management are invisible to the developer. This approach enables developers to increase their focus on the business logic and deliver more value to the core of the business. Serverless computing helps teams increase their productivity and bring products to market faster. It allows organizations to better optimize resources and stay focused on innovation.
What are public, private, and hybrid clouds?
There are three deployment models for cloud computing: public cloud, private cloud, and hybrid cloud. Each deployment model has different aspects that you should consider as you migrate to the cloud.
What are public, private, and hybrid clouds? Deployment model Description Public cloud Services are offered over the public internet and available to anyone who wants to purchase them. Cloud resources like servers and storage are owned and operated by a third-party cloud service provider and delivered over the internet. Private cloud Computing resources are used exclusively by users from one business or organization. A private cloud can be physically located at your organization's on-site datacenter. It also can be hosted by a third-party service provider. Hybrid cloud This computing environment combines a public cloud and a private cloud by allowing data and applications to be shared between them.
The following image illustrates several of the cloud computing concepts that are presented in this unit. In this example, several factors are demonstrated when you're considering where to deploy a database server in a hybrid cloud environment. As your resources move from on-premises to off-premises, your costs are reduced, and your administration requirements decrease.
what is education?2021-05-12 12:50:45education is simply giving out more resources in cultivating the potential of the students if you want to see it in a compare and constrast form without education, student can only do a,b,c with ...
- education is simply giving out more resources in cultivating the potential of the students
- if you want to see it in a compare and constrast form
- without education, student can only do a,b,c
- with education, student can do, a,b,c,d,e,f,g,h and more
- students are the same
- but students with education can do more in depth and are within the requirement of the society
what is love?2021-04-04 19:40:29love is based on the foundation try to make people feel more happy as a family
love is based on the foundation
try to make people feel more happy as a family
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BeginNew / Android: A Programmer's Gde / Dimarzio / 988-6/1Blind Folio 1:1Chapter1What Is Android?P:010CompBeginNew988-6ch01.vpMonday, July 07, 2008 9:47:09 AMColor profile: Generic CMYK printer profileComposite Default screenBeginNew / Android: A Programmer's Gde / Dimarzio / 988-6/1Blind Folio 1:22Android: A Programmer's GuideIt can be said that, for a while, traditional desktop application developers have beenspoiled. This is not to say that traditional desktop application development is easier thanother forms of development. However, as traditional desktop application developers, wehave had the ability to create almost any kind of application we can imagine. I amincluding myself in this grouping because I got my start in desktop programming.One aspect that has made desktop programming more accessible is that we havehad the ability to interact with the desktop operating system, and thus interact with anyunderlying hardware, pretty freely (or at least with minimal exceptions). This kind offreedom to program independently, however, has never really been available to thesmall group of programmers who dared to venture into the murky waters of cell phonedevelopment.NOTEI refer to two different kinds of developers in this discussion:traditional desktopapplication developers, who work in almost any language and whose end product,applications, are built to run on any "desktop" operating system; and Androiddevelopers, Java developers who develop for the Android platform. This is notfor the purposes of saying one is by any means better or worse than the other.Rather, the distinction is made for purposes of comparing the development stylesand tools of desktop operating system environments to the mobile operatingsystem environment, Android.Brief History of Embedded Device ProgrammingFor a long time, cell phone developers comprised a small sect of a slightly larger group ofdevelopers known as embedded device developers. Seen as a less "glamorous" sibling todesktop—and later web—development, embedded device development typically got theKey Skills & Concepts●History of embedded device programming●Explanation of Open Handset Alliance●First look at the Android home screenP:010CompBeginNew988-6ch01.vpMonday, July 07, 2008 9:47:15 AMColor profile: Generic CMYK printer profileComposite Default screenChapter 1:What Is Android?3BeginNew / Android: A Programmer's Gde / Dimarzio / 988-6/1Blind Folio 1:3proverbial short end of the stick as far as hardware and operating system features, becauseembedded device manufacturers were notoriously stingy on feature support. Embeddeddevice manufacturers typically needed to guard their hardware secrets closely, so theygave embedded device developers few libraries to call when trying to interact with aspecific device.Embedded devices differ from desktops in that an embedded device is typically a"computer on a chip." For example, consider your standard television remote control; it isnot really seen as an overwhelming achievement of technological complexity. When anybutton is pressed, a chip interprets the signal in a way that has been programmed into thedevice. This allows the device to know what to expect from the input device (key pad),and how to respond to those commands (for example, turn on the television). This is asimple form of embedded device programming. However, believe it or not, simpledevices such as these are definitely related to the roots of early cell phone devices anddevelopment.Most embedded devices ran (and in some cases still run) proprietary operatingsystems. The reason for choosing to create a proprietary operating system rather than useany consumer system was really a product of necessity. Simple devices did not need veryrobust and optimized operating systems.As a product of device evolution, many of the more complex embedded devices, suchas early PDAs, household security systems, and GPSs, moved to somewhat standardizedoperating system platforms about five years ago. Small-footprint operating systems suchas Linux, or even an embedded version of Microsoft Windows, have become more
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