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TOPICS COVERED IN THE BLOG:

• TESTING BASICS
  
• AGILE
• REST API
• SQL
• Neo4j
• UFT
• RBA
• ML
• ETL
• CLOUD COMPUTING
• MOBILE TESTING
  
• TEST STRATEGY
• TEST METRICS & TEST ESTIMATION
• BIG DATA
• INTERVIEW CODE

• PERFORMANCE TESTING

 

                

Cloud computing

CLOUD COMPUTING is the on-demand availability of computer system resources, especially data storage and computing power, without direct active management by the user. 

CLOUD COMPUTING MODELS:

1. IaaS: infrastructure as a service
2. SaaS: software as a service
3. PaaS: platform as a service
4. IaaS: internet as a service 

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IaaS: 

• IaaS works by mobilising a third-party cloud service provider.
• This cloud provider hosts the IT infrastructure.
• That means servers, cloud storage, hardware and virtualisation.
• IaaS delivery is automated.
• System maintenance and data storage is often handed over to the IaaS provider. 
• In other words, the service provider hosts the infrastructure on their client’s behalf across different datacenters making up the cloud.
• The client accesses the infrastructure online and uses it for the same purposes that an in-house IT infrastructure would traditionally serve.
• It can be accessed through computers, mobile devices, or virtual machines.

 IaaS is well suited for:

• Developmental testing
• Website hosting
• Data storage and analysis
• Online applications
• High-performance computing

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PaaS: 

• One step up from IaaS.
• PaaS (Platform as a Service) is a cloud-computing platform for the development and building of applications.
• PaaS services usually include developmental tools, middleware, operating systems, databases, and infrastructure.

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SaaS: 

• SaaS stands for Software as a Service and provides full applications managed in the cloud.
• It provides access to applications over the internet.
• Users no longer have to purchase and install their business applications locally, and can go completely serverless if they desire. 

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IaaS providers:

• Amazon Web Services (AWS): Top features include Simple Storage Services (S3), Glacier and compute services like the Elastic Compute Cloud (EC2).
• Google Cloud Platform: Offers storage and computing services via the Google Compute Engine. 
• Microsoft Azure: Also offers storage and computing services via the Google Compute Engine.
• IBM Cloud: offers next-generation hybrid cloud platforms, with advanced data and AI capabilities.
• Alibaba Cloud: offers integrated cloud products and services for scalable, secure digitisation. 
• Oracle Cloud: offers on-premises, high-performance computing running cloud-native. 
• Virtustream: offers enterprise-class cloud services for complex IT landscapes.
• CenturyLink: offers communications, network services, cloud, and managed service solutions.
• Rackspace: offers proven multicloud solutions across apps, data, and security. 

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--------------------------------------------------To be continued................................................