8/4/2023 0 Comments Sap enqueue replication server![]() ![]() Such a diskless SBD setup is an optional improvement for three nodes, but does not work for two nodes. However some details are described different here to get a diskless SBD setup. The task list to set up the three node cluster is similar to the task list for the two-node cluster. The major configuration changes will be shown and the basic preparation of the new cluster member node. The examples below will show the setting up of multi-node cluster and the extension of an existing two node cluster pair. More than two nodes for an ASCS / ERS high availability setup. Multi-node cluster setups mean cluster configurations with more than two nodes.ĭepending on the starting point it is possible to extend a two-node cluster setup or directly start with More details can be found in the blog article "Using sap_vendor_cluster_connector for interaction between cluster Sapstartsrv to report state changes to the cluster software. The new updated solution enables the central component Very dangerous situations, if the cluster changes the status of an SAP instanceĭuring some SAP maintenance tasks. Status by either starting or stopping the SAP instance. The interfaces provided by the cluster software, the cluster framework willĭetect that as an error status and will bring the SAP instance into the old SAP instances in a highly available environment is the following: If an SAPĪdministrator changes the status (start/stop) of an SAP instance without using Instances since SAP Kernel versions 6.40. Sap_suse_cluster_connector is of special interest. The integration of the HA cluster through the SAP control framework using the Shared disks allow using SBD as the cluster fencing mechanism. These changes allowed to improve the cluster architecture and toĭesign it for easier usage, maintenance procedures and setup.Īll shared SAP resources are located on a central NFS server. ![]() ![]() The updated certification SAP S/4-HA-CLU 1.0 redefines some of the test proceduresĪnd describes new expectations how the cluster should behave in specialĬonditions. Support of more than two cluster nodes for ASCS and ERS instances allowed SAP HACheckMaintenanceMode and HASetMaintenanceMode Support of automated HA maintenance mode for SAP resources by implementing support of Standard SAP installation to improve support processes Sapstartsrv to ensure that maintenance procedures do not break the cluster stability Integration of the cluster with the native systemd-based SAP start framework Integration of the new SapStartSrv resource agent Implementation of a cluster with a shared SAP applications directory The here described setup is expected to be defaultįor new deployments on SUSE Linux Enterprise Server for SAP Applications 15. SAP S/4HANA ABAP Platform with SAP Enqueue Replication Server 2. That greatly simplifies the overallĪrchitecture, implementation and maintenance of a SUSE Linux Enterprise High Availability cluster for In contrast to the traditional setups, this setup uses an additional NFS mountįor the SAP application layer without the need to have dedicated block devicesĪnd cluster-controlled file systems. Maturity for customers of different sizes and industries. Years of productive operations, the components mentioned have proven their An optimal effect of the enqueue replication mechanism canīe achieved when combining the application level redundancy with a highĪvailability cluster solution, as provided for example by SUSE Linux Enterprise Server for SAP Applications. Level redundancy for one of the most crucial components of the SAP S/4HANA ABAP Platform stack, The SAP Enqueue Replication Server 2 constitutes application ![]() SAP S/4HANA ABAP Platform is a common stack of middleware functionality used to support SAPīusiness applications. The described cluster solution can be used for SAP* SAP S/4HANA ABAP Platform. Many critical business environments require the highest SAP* Business Suite is a sophisticated application platform for large enterprisesĪnd mid-size companies. Of the technical infrastructure, single points of failure can be eliminated. Run SAP* applications with high availability. SUSE® Linux Enterprise Server for SAP Applications is the optimal platform to ![]()
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