Everything besides the code-physical hardware, virtual machine (VM) operating system and web server software management-is provisioned automatically by the cloud service provider in real-time as the code executes and is spun back down once the execution is complete. FaaS allows developers to execute portions of application code (called functions) in response to specific events. With serverless, customers pay only for the resources used when the application is running-they never pay for idle capacity.įaaS, or Function-as-a-Service, is often confused with serverless computing when, in fact, it’s a subset of serverless. Moreover, serverless runs application code on a per-request basis only and automatically scales the supporting infrastructure up and down in response to the number of requests. Serverless computing (also called simply serverless) is a cloud computing model that offloads all the back-end infrastructure management tasks–provisioning, scaling, scheduling, patching-to the cloud provider, freeing developers to focus all their time and effort on the code and business logic specific to their applications. Based on an International Data Center (IDC) survey (link resides outside IBM), SaaS applications represent the largest cloud computing segment, accounting for more than 48% of the $778 billion worldwide cloud software revenue. Hundreds of thousands of SaaS solutions are available, from focused industry and broad administrative (e.g., Salesforce) to powerful enterprise database and artificial intelligence (AI) software. SaaS is the primary delivery model for most commercial software today. Protection from data loss: Because SaaS stores application data in the cloud with the application, users don’t lose data if their device crashes or breaks.Automatic upgrades: With SaaS, users take advantage of new features as soon as the cloud service provider adds them without having to orchestrate an on-premises upgrade.In addition to the cost savings, time-to-value and scalability benefits of cloud, SaaS offers the following: They also may offer these services through pay-per-usage pricing. Cloud service providers offer SaaS based on a monthly or annual subscription fee. Users access SaaS via a web browser, a dedicated desktop client or an API that integrates with a desktop or mobile operating system. SaaS (Software-as-a-Service)-also known as cloud-based software or cloud applications-is application software hosted in the cloud. Red Hat OpenShift is a popular PaaS built around Docker containers and Kubernetes, an open-source container orchestration solution that automates deployment, scaling, load balancing and more for container-based applications. Containers virtualize the operating system, enabling developers to package the application with only the operating system services it needs to run on any platform, without modification and the need for middleware. Today, PaaS is typically built around container s, a virtualized compute model one step removed from virtual servers. Developers simply pick from a menu to spin up servers and environments they need to run, build, test, deploy, maintain, update and scale applications. With PaaS, the cloud provider hosts everything-servers, networks, storage, operating system software, middleware and databases-at their data center. PaaS (Platform-as-a-Service) provides software developers with an on-demand platform-hardware, complete software stack, infrastructure and development tools-for running, developing and managing applications without the cost, complexity and inflexibility of maintaining that platform on-premises. Flash forward to today and Gartner predicts worldwide end-user spending on public cloud will total $679 billion and is projected to exceed $1 trillion in 2027 (link resides outside ibm.com). In 2009, Microsoft launched its first SaaS application, Microsoft Office 2011. That same year, Google introduced Google Apps suite (now called Google Workspace)-a collection of SaaS productivity applications. In 2006, it introduced Elastic Compute Cloud (EC2), an offering that allowed users to rent virtual computers to run their applications. In 2002, Amazon Web Services launched cloud-based storage and computing services. However, it wasn’t until the early 2000s that modern cloud infrastructure for business emerged. Joseph Carl Robnett Licklider (link resides outside ibm.com), an American computer scientist and psychologist known as the ‘father of cloud computing’ introduced the earliest ideas of global networking in a series of memos discussing an Intergalactic Computer Network. The origins of cloud computing technology go back to the early 1960s, when Dr.
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