Session 3-4 Flashcards
What is a Datacenter? Where are datacenters? How are the arranged?
They’re facilities with resources arranged in racks, with dedicated power, cooling, and networking infrastructure.
As a global cloud provider, Azure has datacenters around the world. However, these individual datacenters aren’t directly accessible. Datacenters are grouped into Azure Regions or Azure Availability Zones that are designed to help you achieve resiliency and reliability for your business-critical workloads.
What is a region
geographical area on the planet containing at least one or potentially multiple datacenters that are in close proximity and networked together. If one fails can rely on other
ie US region, Europe or Asia
Availability Zones
Availability zones are physically separate datacenters within an Azure region. Each availability zone is made up of one or more datacenters equipped with independent power, cooling, and networking. An availability zone is set up to be an isolation boundary. If one zone goes down, the other continues working. Availability zones are connected through high-speed, private fiber-optic networks.
Azure is made up of what? How are they organized
Datacenters located around the globe; organized and made available to end users by country/region
sovereign region
an azure region that is designed to meet the specific needs of customers who require compliance with specific regulations or data sovereignty requirements
ie US DoD Central, US Gov Virginia, US Gov Iowa and more: These regions are physical and logical network-isolated instances of Azure for U.S. government agencies and partners. These datacenters are operated by screened U.S. personnel and include additional compliance certifications.
what are region pairs? Why are they important?
Most Azure regions are paired with another region within the same geography (such as US, Europe, or Asia) at least 300 miles away. This approach allows for the replication of resources across a geography that helps reduce the likelihood of interruptions because of events such as natural disasters, civil unrest, power outages, or physical network outages that affect an entire region.
Examples of region pairs in Azure are West US paired with East US and South-East Asia paired with East Asia. Because the pair of regions are directly connected and far enough apart to be isolated from regional disasters, you can use them to provide reliable services and data redundancy.
Azure Physical Infrastructure is made up of what components
datacenters
REgions – region pairs
availability zones
soverign regions
Azure management Infrastructure is made up of what components
Azure resources and resource groups, subscriptions, and account
Resource
A resource is the basic building block of Azure. Anything you create, provision, deploy, etc. is a resource. Virtual Machines (VMs), virtual networks, databases, cognitive services, etc. are all considered resources within Azure.
Resource Group
Resource groups are simply groupings of resources. When you create a resource, you’re required to place it into a resource group. While a resource group can contain many resources, a single resource can only be in one resource group at a time.
Resource groups provide a convenient way to group resources together. When you apply an action to a resource group, that action will apply to all the resources within the resource group. If you delete a resource group, all the resources will be deleted. If you grant or deny access to a resource group, you’ve granted or denied access to all the resources within the resource group.
subscription
like an account; In Azure, subscriptions are a unit of management, billing, and scale. Similar to how resource groups are a way to logically organize resources, subscriptions allow you to logically organize your resource groups and facilitate billing.
azure resource manager
is a management layer in which resource groups and all the resources within it are created, configured, managed and deleted.
How many resource groups can a resource be in at the same time?
A resource can only be in one group at a time.
What happens to the resources within a resource group when an action or setting at the Resource Group level is applied?
setting is applied to current and future resources
Describe Azure Virtual Machines
- you can create and use VMs in the cloud
- VMs provide infrastructure as a service (IaaS) in the form of a virtualized server and can be used in many ways.
- Just like a physical computer, you can customize all of the software running on your VM. VMs are an ideal choice when you need:
Total control over the operating system (OS).
The ability to run custom software.
To use custom hosting configurations.
*An Azure VM gives you the flexibility of virtualization without having to buy and maintain the physical hardware that runs the VM. However, as an IaaS offering, you still need to configure, update, and maintain the software that runs on the VM.
What is an VM Scale Set
Designed for automatic scaling of identical Virtual Machines (VMs); type of azure services for VMs include VM scale set
What are App services
type of azure services for VMs
PaaS offerings to build, deploy, and scale enterprise-grade web, mobile and API apps
