If you've got a moment, please tell us what we did right so we can do more of it. Please provide your valuable feedback and please connect with me for any questions. Create new network interfaces from the AWS Management Console or through the AWS CLI. Since quite a while SAP recommends using virtual hostnames. The parameter listeninterface=.global in the section [system_replication_communication] is used for system replication. if mappings are specified as either neighboring sites(minimum) or all hosts of own site as well as neighboring sites, an internal(separate) network is used for system replication communication. Storage snapshots cannot be prepared in SAP HANA systems in which dynamic tiering is enabled. There are some documentations available by SAP, but some of them are outdated or not matching the customer environments/needs or not all-embracing. Perform SAP HANA After TIER2 full sync completed, triggered the TIER3 full sync The below diagram depicts better understanding of internal networks: The status after internal network configuration: Once the listener interface has communication method internal, the two hosts (HANA & DT hosts) can communicate securely and their internal IP addresses reflects in parameter -> internal_hostname_resolution, Installation of Dynamic Tiering Component. The primary replicates all relevant license information to the 2487639 HANA Basic How-To Series HANA and SSL MASTER KBA As mentioned earlier, having internal networks are essential in production system in order to get the expected response time and optimize the system performance. For more information, see SAP HANA Database Backup and Recovery. The host name specified here is used to verify the identity of the server instead of the host name with which the connection was established. The extended store can reduce the size of your in-memory database. Provisioning dynamic tiering service to a tenant database. Network for internal SAP HANA communication: 192.168.1. network interface in the remainder of this guide), you can create SAP Host Agent must be able to write to the operations.d Replication, Register Secondary Tier for System System replication cannot be used in SAP HANA systems in which dynamic tiering is enabled. Primary Host: Enable system replication. How to Configure SSL in SAP HANA 2.0 Find SAP product documentation, Learning Journeys, and more. When complete, test that the virtual host names can be resolved from Early Watch Alert shows a red alert at section " SAP HANA Network Settings for System Replication Communication (listeninterface) ": SAP Knowledge Base Article - Preview 2777802-EWA Alert: TLS encrypted communication expected (when listeninterface = .global) Symptom But keep in mind that jdbc_ssl parameter has no effect for Node.js applications! Understood More Information User Action: Investigate why connections are closed (for example, network problem) and resolve the issue. Certificate Management in SAP HANA Activated log backup is a prerequisite to get a common sync point for log 2. Although various materials and documents for HANA networks have been available to ease your implementations and re-configurations, you might have found it time-consuming and experienced a hard time to see a whole picture at a glance. * In the first example, the [system_replication_communication]listeninterface parameter has been set to .global and only the hosts of the neighboring replicating site are specified. ALTER SYSTEM ALTER CONFIGURATION ( global.ini, SYSTEM ) SET( customizable_functionalities, dynamic_tiering ) = true. From HANA system replication documentation(SAP HANA Administration Guide -> [Availability and Scalability] -> [High Availability for SAP HANA] -> [Configuring SAP HANA System Replication] -> [Setting Up SAP HANA System Replication] -> [Host Name Resolution for System Replication]), as similar as internal network configurations in scale-out system, there are 2 configurable parameters. This is the preferred method to secure the system as it's done automatically and the certificates are renewed when necessary. On existing HANA DB host we already have two file systems for DATA and LOG: On Dynamic Tiering Host the following file systems are required which will store ES data and logs: So after the above setup the actual architecture will appear as follows: Communication channel and network requirements. enables you to isolate the traffic required for each communication channel. * You have installed internal networks in each nodes. site1(primary) becomes standalone and site3(dr) is required to be promoted as secondary site temporarily while site2 is being repaired/replaced in data center. Scenario : we have 3 nodes scale-out landscape setup and in order to communicate with all participants in the landscape, additional IP addresses are required in your production site. It must have a different host name, or host names in the case of More and more customers are attaching importance to the topic security. Pipeline End-to-End Overview. To learn The additional process hdbesserver can be seen which confirms that Dynamic-Tiering worker has been successfully installed. Deploy SAP Data Warehouse Foundation (Data Lifecycle Manager) Delivery Unit on SAP HANA. This is normally the public network. Since NSE is a capability of the core HANA server, using NSE eliminates the limitations of DT that you highlighted above. network interface, see the AWS The XSA can be offline, but will be restarted (thanks for the hint Dennis). multiple physical network cards or virtual LANs (VLANs). Started the full sync to TIER2 Single node and System Replication(2 tiers), 2. global.ini -> [system_replication_communication] -> listeninterface : .global or .internal For details how this is working, read this blog. Questo articolo descrive come distribuire un sistema SAP HANA a disponibilit elevata in una configurazione con scalabilit orizzontale. Most will use it if no GUI is available (HANA studio / cockpit) or paired with hdbuserstore as script automatism (housekeeping). So I think each host, we need maintain two entries for "2. This section describes operations that are available for SAP HANA instances. Stay healthy, Changes the replication mode of a secondary site. For more information, see: On every installation of an SAP application you have to take care of this names. Amazon EBS-optimized instances can also be used for further isolation for storage I/O. In the following example, ENI-1 of each instance shown is a member Each node has at least 2 physical IP addresses, one is for external network and another is for internal network where data/intermediate results for query processing/database operations can move around. As you create each new network interface, associate it with the appropriate reason: (connection refused). Scale out of dynamic tiering is not available. recovery. Copy the commands and deploy in SQL command. SAP is using mostly one certificate for all components (host agent, DAA, SystemDB, Tenant) which belongs to the physical hostname (systempki). the global.ini file is set to normal for both systems. # Edit least SAP HANA1.0 Revision 81 or higher. To learn more about this step, see You set up system replication between identical SAP HANA systems. EC2 instance in an Amazon Virtual Private Cloud (Amazon VPC). Post this, Installation of Dynamic Tiering License need to done via COCKPIT. In the step 5, it is possible to avoid exporting and converting the keys. The systempki should be used to secure the communication between internal components. If you have a HANA on one server construct which means an additional application server running with the central services running together with the HDB on the same server. On AS ABAP server this is controlled by is/local_addr parameter. This Here we talk about the client within the HANA client executable. The certificate wont be validated which may violate your security rules. Secondary : Register secondary system. A security group acts as a virtual firewall that controls the traffic for one or more The change data for the parameters ssfs_masterkey_changed and ssfs_masterkey_systempki_changed archived in the view SYS.M_HOST_INFORMATION is changed. In multiple-container systems, the system database and all tenant databases # 2021/09/09 updated parameter info: is/local_addr thx @ Matthias Sander for the hint SQL on one system must be manually duplicated on the other Which communication channels can be secured? SAP HANA and dynamic tiering each support NFS and SAN storage using storage connector APIs. I recommend this method, but you can also use the online one (xs set-sertificate) but here you have to follow more steps/options and at the end you have to restart the XSA. These are all pretty broad topic and for now we will focus on the x.509 certificates for encryption of the communication channels between server and clients. Make sure After some more checks we identified the listeninterface and internal_hostname_resolution parameters were not updated on TIER2 and TIER3 License is generated on the basis of Main memory in Dynamic Tiering by choosing License type as mentioned below. SAP HANA Tenant Database . Dynamic tiering adds smart, disk-based extended storage to your SAP HANA database. Therefore, I would highly recommend to stick with the default value .global in the parameter [system_replication_communication]->listeninterface. Dynamic tiering is also supported by the Data Lifecycle Manager (DLM), an SAP HANA XS-based tool to relocate data from SAP HANA memory to alternate storage locations such as the dynamic tiering extended store, SAP HANA extension nodes, or Hadoop/Vora. For details, you could have reference on the guide "How to perform How To Perform System Replication for SAP HANA". Usually, tertiary site is located geographically far away from secondary site. When you launch an instance, you associate one or more security groups with the Step 1. From Solution Manager 7.1 SP 14 on we support the monitoring of metrics on HANA instance-level and also have a template level for SAP HANA replication groups. Internal Network Configurations in System Replication : There are also configurations you can consider changing for system replications. In this case, you are required to add additional NIC, ip address and cabling for site1-3 replication. the OS to properly recognize and name the Ethernet devices associated with the new Updates parameters that are relevant for the HA/DR provider hook. SELECT HOST as hostname FROM M_HOST_INFORMATION WHERE KEY = net_hostnames; Internal Network Configurations in Scale-out : There are configurations youcan consider changing for internal networks. * ww -- wwan, Ethernet cards will always start withen, but they might be followed by a, its key to remember the hex conversion of network cards, https://major.io/2015/08/21/understanding-systemds-predictable-network-device-names/. ENI-3 We can install DLM using Hana lifecycle manager as described below: Click on to be configured. See Ports and Connections in the SAP HANA documentation to learn about the list collected and stored in the snapshot that is shipped. The bottom line is to make site3 always attached to site2 in any cases. with Tenant Databases. If you raise the isolation level to high after the fact, the dynamic tiering service stops working. Please refer to your browser's Help pages for instructions. Configuring SAP HANA Inter-Service Communication, Configuring Hostname Resolution for SAP HANA System Replication, Configuration for logical network separation, AWS configure security groups, see the AWS documentation. # Inserted new parameters from 2300943 Due the complexity of this topic the first part will once more the theoretical one and the second one will be more praxis oriented with the commands on the servers. implies that if there is a standby host on the primary system it Stopped the Replication to TIER2 and TIER3 and removed them from the system replication configuration This blog provides an overview of considerations and recommended configurations in order to manage internal communication channels among scale-out / system replications. The delta backup mechanism is not available with SAP HANA dynamic tiering. Both SAP HANA and dynamic tiering hosts, including standby hosts, use storage APIs to access the devices. SAP HANA dynamic tiering is a native big data solution for SAP HANA. From HANA Scale-out documentation(SAP HANA Administration Guide -> [Availability and Scalability] -> [Scaling SAP HANA] -> [Configuring the Network for Multiple Hosts]), there are 2 configurable parameters. Thanks a lot for sharing this , it's a excellent blog . It would be difficult to share the single network for system replication. Source: SAP 1.2 SolMan communication Host Agent / DAA => SolMan SLD (HTTPS) => SolMan It is now possible to deactivate the SLD and using the LMDB as leading data collection system. For your information, I copy sap note The use of TLS/SSL should be standard for every installation, but to use it on every SAP instance you have to read a lot of documentation and sometimes the provided details are not helpful for complex environments. 1761693 Additional CONNECT options for SAP HANA path for the system replication. # 2021/04/26 added PIN/passphrase option for sapgenpse seclogin (check SAP note 2834711). Figure 10: Network interfaces attached to SAP HANA nodes. Run hdblcm (with root) with the path of extracted software as parameter and install dynamic tiering component without addition of DT host. Alerting is not available for unauthorized users, Right click and copy the link to share this comment, can consider changing for internal network, Public communication channel configurations, Internal communication channel configurations(Scale-out & System Replication), external(public) network : Channels used for external access to SAP HANA functionality by end-user clients, administration clients, application servers, and for data provisioning via SQL or HTTP, internal network : Channels used for SAP HANA internal communication within the database or, in a distributed scenario, for communication between hosts, This option does not require an internal network address entry.(Default). Copyright | * The hostname in below refers to internal hostname in Part1. SAP Note 1834153 . labels) and the suitable routing for a stateful connection for your firewall rules and network segmentation. Starts checking the replication status share. Many newer Amazon EC2 instance types such as the X1 use an optimized configuration stack and the same host is not supported. For instance, you have 10.0.1. The instance number+1 must be free on both ( with root ) with the appropriate reason: ( connection refused ) hint )., we need maintain two entries for `` 2 for a stateful connection for firewall. Using HANA Lifecycle Manager ) Delivery Unit on SAP HANA for further isolation for storage I/O up system replication there.: on every installation of dynamic tiering each support NFS and SAN storage using storage APIs... Stay healthy, Changes the replication mode of a secondary site step 1 for your firewall and! Find SAP product documentation, Learning Journeys, and more confirms that Dynamic-Tiering worker has been successfully installed a site. Storage connector APIs the XSA can be offline, but will be restarted ( thanks the... System_Replication_Communication ] is used for system replication: there are some documentations available SAP. 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