Azure Availability Sets and Availability Zones

A student asked today about the difference between Azure Availability Sets and Availability Zones.
Here's I try to explain the difference between them. If you have any more questions about this, leave them in the comments!
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[@VinothRajaK]

I guess in simpler words, Availability set provides redundancy within a datacenter, Availability zone provides redundancy within a region.
In case of a data center failure, VMs in availability goes down.

[@TheTocas97]

so no possible to have availability within regions ? i mean my VM is deployed in US , West Europe and Brazil for example ? cuz if no , in this case if the whole region is down for some reason ( global disaster in UK for example ) and i set only availability zone there , in this case i will lose my vm ?

[@cooltimus89]

I was going through my Udemy course on AZ-104 and then quickly jumped to TH-cam to get a clear understanding of this topic, and to my surprise, it's the same trainer here on TH-cam as well. Scott Duffy..Excellent job sir. :)

[@25566]

finally someone who understands it, the other videos are useless

[@KiranTamang]

Nice Explanation.Thanks Scott. Waiting for more interesting videos from you.

[@BijouBakson]

No, I know this is about 3 years now but since it's still online, I want to emphasize that his explanation of Fault Domaine & Update domain is inaccurate. Your VMs are placed in different racks for fault tolerance to avoid downtime due to an entire rack failing as a result of anything that might affect the whole rack. Update Domains are to protect machines against planned maintenance. Update domain protects against routined scheduled maintenance; meaning, the VMs will be on different servers but on the same rack. VMs in the same Update domain will be restarted together

[@bryanmendoza3919]

Thanks Scott, you explained it very well

[@ajayaadhav]

Thanks

[@CosmeJunior]

Great video, thanks for the comment below, I may find you on Udemy for my AZ-104 course!

[@ravipaliwal9273]

Thanks for Explanation Scott

[@hiteshl709]

Crystal Clear. thanks for the video.

[@indiautube4915]

Thanks for the explanation and demo. One question: Does choosing Availability Set & Availability Zone cost more

[@kiran5584]

Nice explanation... Please correct me if I am wrong... No vm= no UD? If yes max we can set 20 right ... If we want to configure morthan that what is the way?

[@anantbhat1731]

Thanks..Good explanation

[@harivssc27]

Thank you

[@JohnWest4]

for servers that are in Avail sets, are they typically in same IP Subnet, and servers in Avail zones in different IP subnets?

[@bismibarakath7827]

Excellent..

[@elnaztaromi2213]

Thanks for the video. How VMs are identical in a set? Imagine we have an SFTP server which we want to have it in a AV set, how should we configure them?

[@Navinprasad08]

Nice one

[@CliMzOuu]

When using an Availability Set, are all VMs deployed within the same AZ or are they split across multiple AZ ?
And within an AZ are they split accross multiple Datacenters or not ?
Thanks

[@25566]

availability set means same az but different rack (fault domain) or server (update domain)
and az 1 is one datacenter, az 2 is a different one, etc..

[@CliMzOuu]

@@25566 Thanks for your reply. From my tests, even within a region with AZ when creating an Availability Set you don't see which AZ is used for placement of you VMs. So i imagine it's in a datacenter randomly chosen from one of the 3 Az in the Region.