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Chapter 2, Cloud Concepts - Coggle Diagram

- - - - High Availability
        
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        is core to the cloud
        
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        Tradition vs Cloud
        
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        Tradition
        
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        Cloud
        
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    - - Fault Tolerance
        
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        Resilience
        
        Fault Tolerance is part of the resilience of cloud computing
        
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        Zero Down-Time
        
        Fault caused by Azure are also mitigated by Azure
    - - Disaster Recovery
        
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        Catastrophic Diaster
        
        Hurricane, flood, tornado or cyber attacks are real threats
        
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        Plan to Recover
        
        Complete plan to recover critical business systems
        
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        Specific Points
        
        Designated Time to Recovery (how long does it take to recover?) and Recovery Point (point of time data to recover)
    - - Responsiveness
        
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        Scalability
        
        Scale out, scale up or scale down. Use auto-scaling or critical scenarios
        
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        Elasticity
        
        Ability to quickly expand or decrease computing resources, not just VMs. Elasticity enables scaling
        
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        Agility
        
        The ability to rapidly develop, test and launch software applications that drive business growth
    - - Exam Tips
        
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        High availability means VMs can spin up fast to help process requests
        
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        Fault tolerance describes how Azure will ensure you have zero downtime for services provided by Azure
        
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        Disaster recovery uses time-to-recovery and recovery point metrics to recover from tornadoes, floods and more
        
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        Scalability refers to scaling out or scaling up
        
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        Elasticity is the ability to quickly increase or decrease computer processing and resources
        
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        Agility means to the ability to rapidly develop, test and launch software applications
- - - - Capital and Operational Expenditure
        
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        Capital Expenditure
        
        Money spent by a business or organization on acquiring or maintaining fixed assets, such as land, buildings and equiment
        
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        Operational Expenditure
        
        An ongoing cost for running a product, business, or system on a day-to-day basis, including annual costs
    - - Cloud Pricing Models
        
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        Hourly Pricing
        
        VMs, App Services
        
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        Consumption
        
        pay for resources
    - - Consumption-based pricing
        
        Per Execution
        
        Per Second
        
        Combination
    - - Exam Tips
        
        Using the right budget in a company can enable huge change
        
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        Capital Expenditure (CapEx) is buying hardware outright, paid upfront as a one time purchase
        
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        Operational Expenditure (OpEx) is on going costs needed to run your business
        
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        Consumption-based pricing let's you pay only for what you use
- - - - Infrastructure-as-a-service
        
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        IaaS
    - - Platform-as-a-service
        
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        PaaS
    - - Software-as-a-service
        
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        SaaS
    - - Serverless
        
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        Extreme PassS
    - - Exam Tips
        
        Iaas provides servers, storage and networking as a service
        
        PaaS is a superset of IaaS and also includes middleware, such as database management tools
        
        SaaS is when a service is build on top of PaaS like Office 365
        
        Serverless means that you don't have any servers. Let's a single function be hosted, deployed, run and managed on its own
- - - - Solutions and Services
        
        Large selection from Microsoft and partners. Apps, VMs, templates, services and oh so much more
    - - Azure App Store
        
        Buy cloud services with a single click (almost). Many categories of items to acquire
    - - Easy to Integrate
        
        Use from Portal, CLI or PowerShell. Some are free, some are paid
    - - Publish Your Own
        
        If you are a MS Partner public your own services in the marketplace
- - - - Private cloud
        
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        Pros
        
        Complete control of infrastructure
        
        Benefits of public cloud
        
        Better security and privacy
        
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        Cons
        
        Maintenance
        
        Staffing
    - - Public
        
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        Pros
        
        No purchase of hardware
        
        Low monthly fees
        
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        Cons
        
        No control over features and versions
        
        No physical access
    - - Hybrid
        
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        Pros
        
        Avoid disruptions and outages
        
        Adhere to regulation, governance etc.
        
        Span both public and private cloud
        
        Alleviate CapEx investments
        
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        Cons
        
        Complex infrastructure
    - - Exam Tips
        
        Choose your cloud architecture model wisely
        
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        Private cloud is Azure on your own hardware in a location of your choice. All the benefits of public cloud, but you can lock it down. A lot of staff required
        
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        Public cloud is Azure, AWS, GCP. No upfront costs, but monthly usage. Little control over services and infrastructure
        
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        A hybrid cloud mode is the best of private and public, but could be complex
- - - - Language of Cloud Computing
        
        High availability, fault tolerance, disaster recovery, scalability, elasticity and agility. Describes stable and dependable cloud computing, the ability to adapt to changes in resource demand, user base and application usage
    - - Language of Cloud Economics
        
        CapEx and OpEx describe costs for computing. OpEx is cloud computing with a pay-as-you-go model
    - - Cloud Service Models
        
        IaaS, PaaS and SaaS are cloud service model that pretty much all Azure products and services fall under.
        The shared responsibility model dictates whether you or MS is responsible for a cloud service
    - - Azure Marketplace
        
        An extra layer of functionality for your cloud applications, by letting users use and integrate third-party products and services
    - - Cloud Architecture Model
        
        Private, public and hybrid approaches to using cloud computing for your business