I come across the following link about cloud witness
https://docs.microsoft.com/en-us/windows-server/failover-clustering/deploy-cloud-witness
Suppose I am going to deploy a AAG (3 nodes ) 2 nodes in the same region and 1 nodes in the other region .
Is it still need need a cloud witness ( or witness) for the cluster
and if cloud witness are use , which region of the blob should create for cloud witness ?
And network requirement from the Azure VM to the blob storage for cloud witness?
And what's the performance comparing cloud witness and fileshare witness ?