High Availability - ANSWER Agreed level of uptime. If a server goes down, we have another to go to. Read in a %. Specified in an SLA. Achieved using redundancy. Availability zones and availability certifications.
Scal
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High Availability - ANSWER Agreed level of uptime. If a server goes down, we have another to go to. Read in a %. Specified in an SLA. Achieved using redundancy. Availability zones and availability certifications.
Scalability - ANSWER Scaling up: More CPU cores, memory, or disks
Scaling out: More servers
Elasticity - ANSWER Elastic computing is the ability to quickly expand or decrease computer processing, memory, and storage resources to meet changing demands without worrying about capacity planning and engineering for peak usage. Automatic.
Can see this in action in App Service automatic traffic manager
Agility - ANSWER Engineering resource availability. Provisioning new resources is fast.
Business response to changing conditions or opportunity is easy in Azure.
How fast Azure can allocated or deallocate resources
Fault Tolerance - ANSWER Continue providing service to underlying application even after the failure of one or more components in any layer.
Disaster Recovery - ANSWER Backups, screenshots, and restore strategy. Retain multiple copies of data as a security measure in case of unforeseen loss.
Global Reach - ANSWER The ability to reach audiences around the globe.
Customer Latency Capabilities - ANSWER Provide all services around the globe with a fast connection.
Predictive Cost Considerations - ANSWER Essentially a cost calculator for Azure.
Security - ANSWER Azure can control security policies for your services. You can monitor and change these.
Economies of Scale for Azure - ANSWER Amazon, Microsoft, Google, are not buying the most robust enterprise grade disks, storage controllers, server chassis, etc.
Cost advantages that enterprises obtain due to scale of operation.
Differences between Capital Expenditure (CapEx) and Operational Expenditure (OpEx) - ANSWER Capital Expenditure is an expense a business incurs to create a benefit in the future. Upfront payment. Accounted for over useful life. Ex: buying new server hardware and software for data center.
Operational Expenditure is an expense required for the day to day. Monthly or yearly payment. Accounted for in current month or year. An operating cost. Ex: IaaS offering from Azure
What is the consumption-based model? - ANSWER Pay for what you use. Function apps and logic apps have a consumption based plan.
Describe IaaS - ANSWER Azure VMs. You manage Applications, Data, Runtime, Middleware, O/S :: Azure manages Virtualization, Servers, Storage, and Networking
Describe PaaS - ANSWER Azure cloud services, Azure App services. You manage Applications and Data :: Azure manages Runtime, Middleware, O/S, Virtualization, Servers, Storage, and Networking
Describe SaaS - ANSWER Azure Websites. Azure manages Application, Data, Runtime, Middleware, O/S, Virtualization, Servers, Storage, and Networking.
Public Cloud - ANSWER Most common way of cloud computing. Cloud resources such as storage, and server are owned and operated by a third-party cloud service provider (Azure). All hardware, software and other supporting infrastructure is owned and managed by the cloud provider. Lower costs, no maintenance, near-unlimited scalability, high reliability
Benefits: No CapEx, Agility, Consumption-based.
Private Cloud - ANSWER Computing resources used exclusively by one business or organization. The private cloud can be physically located at an on-site datacenter, or hosted by a third-party service provider. All hardware and software are dedicated solely to the organization - governments and banks use this a lot. More flexibility, improved security, high scalability.
Benefits: Control, Security
Hybrid Cloud - ANSWER Data can move between private and public cloud greater flexibility and more deployment options. Use public cloud for high-volume, lower security needs such as web-based email, and the private cloud for sensitive, business-critical operations like financial reporting. In hybrid cloud, "cloud bursting" is also an option: when an application or resource runs in the private cloud until there is a spike in demand, such as seasonal event or tax filing, can then burst into the public cloud for additional computing resources. Gives control, flexibility, cost-effectiveness, scalability, and ease of transferring workloads gradually.
Benefits: Flexibility, Compliance
Regions - ANSWER A set of datacenters deployed within a latency-defined perimeter and connected through a dedicated regional low-latency network.
Availability Zones - ANSWER Physically separate locations within an Azure region. Each Availability Zone is made up of one or more datacenters equipped with independent power, cooling, and networking. Offer high availability and low latency.
Availability Sets - ANSWER Help ensure applications remain online if high-impact maintenance event is required, or hardware failure.
Made up of update domains and fault domains.
UD: when maintenance occurs, update is sequenced through update domains
FD: provide physical separation of a workload across different hardware in the data center.
Resource Groups - ANSWER A container that holds related resources for an Azure solution. Includes those resources (VMs, app services, storage account), that you want to manage as a group.
Azure Resource Manager - ANSWER Provides a consistent management layer to perform tasks through the Azure portal. All of these capabilities are also available through AZ PowerShell, CLI, REST APIs, and client SDK.
Can manage infrastructure, create/ deploy, update resources with template json files.
Can deploy, manage, monitor all the resources for your solution as a group, rather than individually.
Repeatedly deploy solution throughout the dev cycle and have resources deployed in a consistent state.
Define dependencies between resources so they're deployed in that correct order.
Apply role-based access.
Apply tags to logically organize resources.
Clarify organizations billing by viewing groups of tagged resources.
Benefits and usage of core Azure Architectural Components. - ANSWER Easy to deploy and manage.
Keep organized.
Stay available for development. Stay consistent with releases.
Understand billing of each resource.
Restrict or allow access.
Manage zone for optimal availability and latency.
VMs - ANSWER On demand, high-scale, secure, virtualized infrastructure using Windows Server. It's a virtual computer. IaaS
VM Scale Sets - ANSWER Create and manage a group of identical, load balanced VMs. The number of VM instances can be auto-scaled depending on current load. Provide high-availability to apps, and allow you to centrally manage, configure, and update a large number of VMs. Provide redundancy and improve performance.
App Service - ANSWER Build web, mobile, and API apps using .NET, .NET Core, Java, Ruby, Node.js, PHP, Python and Docker. Essentially a website hosting space. You provide Application and Data, Azure does the rest. PaaS.
Azure Functions - ANSWER Support triggers like queues or HTTP requests, or timers to run small pieces of code. Write individual functions that will be called when you want. Can link up with an App Service for a dedicated plan, or a consumption plan that allows you to pay for how much you use the function.
Container Services - ANSWER Containers are a virtualization environment, but without O/S.
Azure container instances: a PaaS offering that allows you to upload containers, which it then will run for you.
Azure Kubernetes - ANSWER Container orchestrator service for managing a large number of containers.
Virtual Network - ANSWER Enables many types of Azure resources, such as Azure VMs to securely communicate with each other, the internet, or on-premise networks. A Virtual Network is scoped to a single region; however, multiple regions can be connected via Virtual Network Peering.
Offers Isolation and Segmentation. Assigns a private IP, segment the Virtual Network into one or more subnets and allocate a portion of the address to the subnet. User Azure-provided name resolution or own DNS server for use by resources in a Virtual Network.
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