Putting this together with things I already know
Geography = Australia
For Geography I like to think of a Country
- Australia East = Brisbane
- Australia Central = Sydney
- Australia Central 2 = Canberra
- Australia Southeast = Melbourne
Within Azure I think that Regions loosely equate to Locations. Looking at the output of Get-AzLocation as shown below
Availability Zones would be separate data centers in a Region e.g they need to be close to each other so the latency is low. Microsoft doesn't have many Availability Zone enabled regions in comparison to AWS. For example there may be 3 data centers in a city that Microsoft groups into an Availability Zone
The next level down as I see it is Fault Domains and Update Domains. AKA Availability Sets. Apparently it helps to think of them as follows
- Fault Domain - Server Rack (separate power and hardware) with a bunch of servers in it
- Update Domain - Individual servers that get updated and patched at different times than other servers in the same rack
Apparently there are different numbers of Fault Domains available in different regions but the default is 3
Regions are also paired to allow BCDR practices within a Geography (i.e. you don't send your data overseas but the paired region is far enough away hopefully not to suffer an outage too)
For Australia the pairings are
| Geography | Region/Location | Region/Location |
| Australia | Australia East | Australia Southeast |
| Australia | Australia Central | Australia Central 2 |
Get-AzLocation | Sort-Object Location `
| Select Location, DisplayName | ft
Location DisplayName
-------- -----------
australiacentral Australia Central
australiacentral2 Australia Central 2
australiaeast Australia East
australiasoutheast Australia Southeast
brazilsouth Brazil South
canadacentral Canada Central
canadaeast Canada East
centralindia Central India
centralus Central US
eastasia East Asia
eastus East US
eastus2 East US 2
francecentral France Central
francesouth France South
germanywestcentral Germany West Central
japaneast Japan East
japanwest Japan West
koreacentral Korea Central
koreasouth Korea South
northcentralus North Central US
northeurope North Europe
southafricanorth South Africa North
southafricawest South Africa West
southcentralus South Central US
southeastasia Southeast Asia
southindia South India
switzerlandnorth Switzerland North
switzerlandwest Switzerland West
uaecentral UAE Central
uaenorth UAE North
uksouth UK South
ukwest UK West
westcentralus West Central US
westeurope West Europe
westindia West India
westus West US
westus2 West US 2
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