This article describes assuring high availability for Azure Analysis Services servers.
Assuring high availability during a service disruption
While rare, an Azure data center can have an outage. When an outage occurs, it causes a business disruption that might last a few minutes or might last for hours. High availability is most often achieved with server redundancy. With Azure Analysis Services, you can achieve redundancy by creating additional, secondary servers in one or more regions. When creating redundant servers, to assure the data and metadata on those servers is in-sync with the server in a region that has gone offline, you can:
Deploy models to redundant servers in other regions. This method requires processing data on both your primary server and redundant servers in-parallel, assuring all servers are in-sync.
Back up databases from your primary server and restore on redundant servers. For example, you can automate nightly backups to Azure storage, and restore to other redundant servers in other regions.
In either case, if your primary server experiences an outage, you must change the connection strings in reporting clients to connect to the server in a different regional datacenter. This change should be considered a last resort and only if a catastrophic regional data center outage occurs. It's more likely a data center outage hosting your primary server would come back online before you could update connections on all clients.