Availability Sets Vs Availability Zones - Azure

In this post lets figure out what to use and what is the difference between Av-set and Av-zone.

Most important part is these 2 are separate features provided by Azure for HA & cant be used together. You can either opt for Av-set or Av-zone, you can use both together.

Av-set is old feature as compare to Av-zone and available on all the regions but not Av-zone. If you want to use Av-zone , first confirm availability in your region and second confirm are all the services supported, may possible few services not zonal as of now but soon will be.

Below are the few difference and understanding of Av-set and Av-zone :-

Availability Set	Availability Zone
It is a logical grouping capability for VM's where VM's are placed between different fault and Update domains	It is unique physical locations within Azure regions & each Zone is made up of one or more data-centers equipped with independent power, cooling and networking
Update domain - 20  & Fault Domain - 3	1,2 & 3 - Av-Zone
Offers 99.95% SLA (2 or more VM)	Offers 99.99% SLA
Protect from Hardware failures within Data Centers	Protect from entire data center failure
Basic LB can work with Av-set	Standard LB supports Av-Zone

Here is the Video for Azure VM availability options:-

                                           

If you think something is missing , please add comment or if you want to add something.