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Merge pull request #312551 from Xelu86/sapascsshareddisk
[Update] SAP ASCS/SCS instance multi-SID high availability with Windows Server Failover Clustering and shared disk on Azure
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articles/sap/workloads/sap-ascs-ha-multi-sid-wsfc-file-share.md

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> ![Windows OS][Logo_Windows] Windows
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You can manage multiple virtual IP addresses by using an [Azure internal load balancer][load-balancer-multivip-overview].
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You can manage multiple virtual IP addresses by using an [Azure internal load balancer][load-balancer-multivip-overview].
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If you have an SAP deployment, you can use an internal load balancer to create a Windows cluster configuration for SAP Central Services (ASCS/SCS) instances.
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>The maximum number of SAP ASCS/SCS instances in one WSFC cluster is equal to the maximum number of private front-end IPs for each Azure internal load balancer.
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> The configuration introduced in this documentation is not yet supported to be used for [Azure Availability Zones](/azure/reliability/availability-zones-overview)
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For more information about load-balancer limits, see the "Private front-end IP per load balancer" section in [Networking limits: Azure Resource Manager][networking-limits-azure-resource-manager]. Also consider using the [Azure Standard Load Balancer SKU](../../load-balancer/load-balancer-standard-availability-zones.md) instead of the basic SKU of the Azure load balancer.
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> The setup must meet the following conditions:
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> * The SAP ASCS/SCS instances must share the same WSFC cluster.
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> * Different SAP Global Hosts file shares belonging to different SAP SIDs must share the same SOFS cluster.
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> * The SAP ASCS/SCS instances and the SOFS shares must not be combined in the same cluster.
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> * The SAP ASCS/SCS instances and the SOFS shares must not be combined in the same cluster.
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> * Each database management system (DBMS) SID must have its own dedicated WSFC cluster.
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> * SAP application servers that belong to one SAP system SID must have their own dedicated VMs.
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> * A mix of Enqueue Replication Server 1 and Enqueue Replication Server 2 in the same cluster is not supported.
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> * A mix of Enqueue Replication Server 1 and Enqueue Replication Server 2 in the same cluster is not supported.
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## SAP ASCS/SCS multi-SID architecture with file share
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The goal is to install multiple SAP Advanced Business Application Programming (ASCS) or SAP Java (SCS) clustered instances in the same WSFC cluster, as illustrated here:
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The goal is to install multiple SAP Advanced Business Application Programming (ASCS) or SAP Java (SCS) clustered instances in the same WSFC cluster, as illustrated here:
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![Figure 2: SAP multi-SID configuration in two clusters][sap-ha-guide-figure-8008]
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[sap-ha-guide-9.1.1]:#a97ad604-9094-44fe-a364-f89cb39bf097
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[sap-ascs-ha-multi-sid-wsfc-shared-disk]:sap-ascs-ha-multi-sid-wsfc-shared-disk.md
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[sap-ascs-ha-multi-sid-wsfc-shared-disk-infrast-prepare]:sap-ascs-ha-multi-sid-wsfc-shared-disk.md#25e358f8-92e5-4e8d-a1e5-df7580a39cb0
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[sap-ascs-ha-multi-sid-wsfc-shared-disk-infrast-prepare]:sap-ascs-ha-multi-sid-wsfc-shared-disk.md#prepare-the-infrastructure-for-an-sap-multi-sid-scenario
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[Logo_Linux]:media/virtual-machines-shared-sap-shared/Linux.png
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[Logo_Windows]:media/virtual-machines-shared-sap-shared/Windows.png
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