Friday, February 22, 2019

What is Platform-as-a-Service (PaaS) - Explained - SingleWindowTech

Platform As A Service - PaaS

A growing interest in moving software applications, services, and even infrastructure resources from in-house premises to external providers has been witnessed recently. It is not necessary anymore to bear considerable costs for maintaining the IT infrastructures or to plan for peak demand. Instead, infrastructure and applications can scale elastically according to the business needs at a reasonable price.
The possibility of instantly reacting to the demand of customers without long-term planning is one of the most appealing features of cloud computing, and it has been a key factor in making this trend popular among technology and business practitioners. 

Today integration of cloud is more important in any software applications. Platform-as-a-Service (PaaS) solutions offer the right tools to implement and deploy hybrid clouds. They provide enterprises with a platform for creating, deploying, and managing distributed applications on top of existing infrastructures. They are in charge of monitoring and managing the infrastructure and acquiring new nodes, and they rely on virtualization technologies in order to scale applications on demand. Every organization is different, but the best PaaS solutions can deliver a broad range of benefits for application developers, IT professionals, and business users alike.

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Platform As A Service - PaaS
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Platform-as-a-Service (PaaS):

  • A Complete platform for hosting applications in Cloud
  • All the infrastructure is managed for you 
  • Enables businesses to build and run web-based, custom applications in an on-demand fashion
  • Eliminates the complexity of selecting, purchasing, configuring, and managing hardware and software
  • Dramatically decreases upfront costs

Process Management in PaaS:

  • Task Management: Allows applications to perform work outside of a user request, and organize that work into small, discrete units, called "tasks," to be executed later
  • Scheduled Tasks: Allows applications to configure regularly scheduled tasks that operate at defined times or regular intervals
  • Remote: Lets external applications transparently access App Engine services. For example, you can use Remote API to access a production datastore from an app running on your local machine.
  • Multitenancy: Makes it easy to compartmentalize your data to serve many client organizations from a single instance of your application.

Design and Implementation Guidelines in PaaS:

  • Support for Heterogeneity: Hybrid clouds are produced by heterogeneous resources such as clusters, public or private virtual infrastructures, and workstations.
  • Support for Dynamic and Open Systems: Hybrid clouds change their composition and topology over time. They form as a result of dynamic conditions such as peak demands or specific Service Level Agreements attached to the applications currently in execution.
  • Support for Flexible Scheduling: The heterogeneity of resources that constitute a hybrid infrastructure naturally demands flexible scheduling policies. Public and private resources can be differently utilized, and the workload should be dynamically partitioned into different streams according to their security and quality of service (QoS) requirements.
  • Workload Monitoring: Workload monitoring becomes even more important in the case of hybrid clouds where a subset of resources is leased and resources can be dismissed if they are no longer necessary. Workload monitoring is an important feature for any distributed middleware, in the case of hybrid clouds, it is necessary to integrate this feature with scheduling policies that either directly or indirectly govern the management of virtual instances and their leases.
  • Resource Pool: This is a container of virtual resources that mostly come from the same resource provider. A resource pool is in charge of managing the virtual resources it contains and eventually releasing them when they are no longer in use.
  • Provisioning Policy: Scheduling services can be customized with resource provisioning aware algorithms that can perform scheduling of applications by taking into account the required QoS.

Advantages of PaaS:

  • A user does not have to manage low-level computing resources and services
  • Many services ready to use in a plug-in fashion without any configuration or setup 
  • Provider handles most of the non-functional requirements of your applications
  • Scaling is automatically managed by the platform
  • Easier and Agile application deployment

How to use PaaS?

  • Developing and testing new applications: Significantly reduce development times and costs while increasing developer productivity.
  • Moving applications to the cloud: Protect your existing investments and reduce data center costs—all while increasing the performance, availability, and scalability of your current enterprise applications. 
  • Extending SaaS applications: Give your business the support it needs by providing solutions for specific challenges quickly and cost-effectively.
  • Analyzing big data: Easily access the computer resources to analyze vast quantities of data from multiple sources —and deliver faster, deeper insights into all your decision-makers.
  • Testing platform upgrades: Reduce the time, cost, and risk of software upgrades —and bring enhanced capabilities online without a hitch.

Why Developers and IT Professionals love?

In terms of developers’ perspective:
  • Develop and deploy innovative apps at speed
  • Focus on creating apps, not managing infrastructure
  • Take control, with self-service development and deployment environments

In terms of IT professionals’ perspective:
  • Reduce complexity and costs
  • streamline IT operations
  • Increase responsiveness to business needs

In terms of Business Users’ perspective:
  • Extend apps to address specific business requirements
  • Enhance collaboration and productivity
  • Gain real-time business insights

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