IaaS (Infrastructure as a Service), PaaS (Platform as a Service) and SaaS (Software as a Service) are the models of cloud computing and can be termed as the building blocks of modern computing. These on-demand cloud services are greatly considered by organizations during application and infrastructure deployment. The IaaS provides the user with the highly automated and scalable computing services with extreme flexibility and control. PaaS provides a platform to develop and deploy applications automating infrastructure provisioning. SaaS use the internet to avail the applications to its users, therefore, eliminating the need for installing and running the programs on the personal devices thus customer or an organization doesn't need to purchase additional hardware. The services provided automatically scale with an increase in demand and the users are charged based on the resources and services usage rather than on a monthly fee.
Lack of Transparency: Since the infrastructures are owned by the IaaS providers, the infrastructure configuration and performance are barely transparent to the user leading to difficulties in system management.
Poor Service Resilience: When the IaaS providers experience internal or external downtime, the users’ workloads are greatly affected.
Platform Lock-In: The applications are build using the vendors’ specific platform tools thus becoming too hard to switch or migrate the application to another PaaS providers.
Security Challenges: The external vendor might store the application data and the databases via a further third party thus making it hard to completely access and test the security of those applications.
The SaaS provides the users with access to software managed by a third party vendor where they are required to log in to the web or an API to access the application residing in a remote cloud network. The Saas customers enjoy the applications without worries about software development, maintenance, updates, and backups. They don't have to download or install the applications in their devices since the majority of the applications are run directly via the web or browser-based interface. The customers pay for only those applications they use which is cheaper than paying for a licensed application. Some of the leading SaaS providers include Microsoft, DropBox, Salesforce, Amazon Web Services, and Google G Suite.
Managed from a Centralized Location: The applications are installed at a central server rather than on individual machine thus no hardware installation is required. Applications are virtually accessible anywhere using the internet-connected devices.
No Customer Intervention in Software Updates: The vendor is responsible for the software performance and maintenance thus obviating the need for customers to download the upgrades.
Automatic Updates: The customers are not required to purchase new hardware and software since the SaaS automatically perform patch management and updates. This reduces the work overload to the IT staff.
Affordable: SaaS doesn't require an organization to install and run applications in data centers thus eliminating the expense of hardware acquisition, maintenance and software licensing.
Scalable Usage: The SaaS provides the user with an opportunity of accessing the only on-demand features thus cutting unnecessary expenses. Accessibility and reliability- The users are able to access the services from anywhere as long as they have networked devices. The services can be obtained at any time since they are stored on the online servers on the internet.
No/Poor Internet Connection, No Application: Low bandwidth can hinder customers from accessing the applications.
Security Breaches: Service providers may bring unwanted changes to the services which may pose insecurity issues to customer data.
SaaS Suitability: Short-term projects requiring collaboration: SaaS is ideal in cases where the application should run smoothly with minimal input.
In applications with demand for web services as well as mobile access and start-up businesses which don’t care much about software updates and server configurations.
IaaS Suitability: Useful to organizations which require complete control over their applications and those don't wish to spend resources to procure hardware and software resources.
Suitable to growing organizations which have not yet decided on the application and don’t want to commit to hardware /software resources.
PaaS Suitability: Suitable to organizations which have adapted to the agile methodology for software development and the ones which want to customize their applications.
Technology and processes can be learned and copied; service instead is one of the few competitive advantages that can be sustained over time. Our goal is to provide such a level of service that not only our advantage is maintained over time, but can be transferred to our customers to support them in their process of generating added value.
Carlos Corral Allari, Inc.
I enjoy sharing what I’ve learned with clients and colleagues to help them better utilize both people and technology to improve their business and productivity. I feel fortunate to be part of such an experienced and highly-skilled team that works well together, shares knowledge, and keeps our clients’ businesses running smoothly.
Ravi Madhavan Allari, Inc.