Recently Microsoft announced general availability of Azure Shared Disks.
We are happy to announce Azure Shared Disks support for SAP central services (ASCS/SCS) instance on Windows Failover Cluster!
Azure shared disks enable an Azure disk to be attached to multiple VMs in a cluster and supports the SCSI Persistent Reservations (PR) industry standard.
Shared Disk is a well-known option for running highly available SAP ACS/ASCS instances on WSFC. This is commonly used on-premises in both physical and virtual environments.
Features of the solution are:
SAP Multi-SID is supported as well.
Please refer to official documentation for list of limitations.
Important: When deploying SAP ASCS/SCS Windows Failover cluster with Azure shared disk, be aware that your deployment will be operating with a single shared disk in one storage cluster. Your SAP ASCS/SCS instance would be impacted, in case of issues with the storage cluster, where the Azure shared disk is deployed.
You can find further information here:
The documentation above covers a manual procedure to deploy and prepare the infrastructure for the SAP ASCS/SCS using Azure Shared Disks.
With this Azure ARM Template , you can automate the infrastructure preparation for a single SAP SID with ERS1. The Azure ARM template will create two Windows Server 2019 or 2016 VMs, the Windows OS will be added to an existing Windows Active Directory domain, a shared disk will be created, attached to the VMs, and formatted with a drive letter; Azure Availability Set and Proximity Placement Group will be created and VMs will be added; Azure Internal Load Balancer will be created and configured; Azure cloud witness as a majority maker is created and configured etc.
Azure shared disks are discussed in SAP on Azure - Video Podcast #8 - The One with the Azure Shared Disks:
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