Explore high availability of SAP application servers
A specific high availability solution isn't needed for your SAP Application Servers. You can achieve high availability by redundancy. To implement it, you can install individual application servers on separate Azure Virtual Machines. You should have at least two SAP application instances installed in two instances of Azure Virtual Machines. Additionally, place all virtual machines that host SAP Application Server instances in the same Azure availability set. An Azure availability set ensures that:
- Each Azure Virtual Machine belongs to a different upgrade domain: ensures that the Hyper-V hosts for these virtual machines aren't updated at the same time during planned maintenance events that require a temporary downtime.
- Each Azure Virtual Machine belongs to a different fault domain: ensures that virtual machines are deployed such that a localized rack-level failure doesn't affect the availability of all Azure Virtual Machines.