Platform as a Service (PaaS).

 Cloud Computing Service Models

PaaS

Platform as a Service (PaaS)

• Good day, the user. As we all know, Cloud Computing offers a wide range of services. So, today, we'll look at Platform-as-a-Service, which is one of the most important Cloud Computing services. 
• PaaS provides developers with a complete cloud platform for designing, running, and maintaining applications that is both versatile and cost-effective. So let's get started.

What is PaaS (Platform as a Service)?

• PaaS stands for Platform-as-a-Service in the cloud computing environment. 
• Customers can use this service to get the whole set of cloud platforms, including hardware and software infrastructure. 
• In PaaS, developers typically rent the needs for building an application from cloud vendors. PaaS tools are simple and convenient to use.

Characteristics of PaaS Server.

1. Various people can access the same development application.
2. Integrates with databases and web services.
3. Based on virtualization technology, resources can be readily scaled up or down to meet the needs of the enterprise.
4. Multiple languages and frameworks are supported.
5. The ability to "Auto-scale" is included.

Programming languages, application frameworks, databases, and other tools are provided by PaaS providers:

Programming languages.

• Developers can create applications using a variety of programming languages provided by PaaS providers. 
• Java, PHP, Ruby, Perl, and Go are some of the most popular programming languages offered by PaaS companies.

Application frameworks.

• Application frameworks are provided by PaaS providers to make application development easier to grasp. 
• Node.js, Drupal, Joomla, WordPress, Spring, Play, Rack, and Zend are some of the most popular application frameworks offered by PaaS companies.

Databases.

• To connect with the apps, PaaS providers provide databases such as ClearDB, PostgreSQL, MongoDB, and Redis.

Other tools

• Other tools needed to create, test, and deploy applications are provided by PaaS providers.

Advantages of PaaS.

Simplified Development.

• Developers can concentrate on development and innovation instead of worrying about infrastructure administration with PaaS.

Lower risk.

• There is no need to invest in hardware or software upfront. To get started, developers need a computer and an internet connection.

Prebuilt business functionality.

• Some PaaS companies additionally supply pre-defined business functionality, allowing users to avoid having to construct everything from the ground up and instead jump right into their projects.

Instant community.

• PaaS companies commonly offer online forums where developers may exchange ideas, learn from others, and seek help (Quora).

Scalability.

• Without making any changes to the applications, they may scale from one to thousands of users.

Disadvantages of PaaS server.

Vendor lock-in

• Because applications must be written for the platform supplied by the PaaS vendor, transfer of an application to a different PaaS vendor would be difficult.

Data Privacy

• Corporate data, whether vital or not, is private, thus if it is not kept within the company's gates, there is a risk of data privacy being compromised.

Integration with the rest of the systems applications

• It's possible that some programs are local and others are cloud-based. 
• As a result, there is a risk of additional complexity if we want to combine data from the cloud with local data.
• Example: AWS Elastic Beanstalk, Windows Azure, Heroku, Force.com, Google App Engine, Apache Stratos, Magento Commerce Cloud, and OpenShift are some of the most popular cloud platforms.

PaaS Vendors

The services offered by PasS Venders are as follows..

• Amazon Web Services (AWS)
• Microsoft Azure
• Google Cloud Platform
• IBM Cloud
• Red Hat
• Oracle
• Heroku
• Mendix
• Engine Yard
• Pivotal

Google App Engine (GAE)

The services offered are as follows..

• App Identity
• URL Fetch
• Cloud storage client library
• Log service

Salesforce.com

The services offered by Salesforce.com are as follows..

• Faster implementation
• Rapid scalability
• CRM Services
• Sales cloud
• Mobile connectivity
• Chatter

Windows AZURE

The services offered by Windows AZURE are as follows..

• Compute
• Security
• IoT
• Data Storage.

AppFog

The services offered by AppFog are as follows..

• Justcloud.com
• SkyDrive
• GoogleDocs

Openshift

The services offered by Openshift are as follows..

• RedHat
• Microsoft Azure

Cloud Foundry from VMware

The services offered by Cloud Foundry from VMware..

• Data, Messaging, and other services.