HI DongKyun Kim, thanks for explanation . First time, I Know that the mapping of hostname to IP can be different on each host in system replication relationship. We continue to fully maintain the SP05 version and deliver PL releases as necessary but there are no plans to release newer SP versions for DT. Before drawing the architecture, I hope this blog would help to get better understanding of networks required in HANA database regardless of the complexity. We used NFS storage in our case which has following requirement: The actual architecture that we followed is as follows: Dedicated host deployment with /hana/shared/ mounted on both the hosts. IMPORTANT : the parameters in the global.ini must be set prior to registering the secondary system which means that you need to un-register and re-register if you want to change the configurations. At the time of the parameters change in Production both TIER2 and TIER3 systems were stopped and removed from Replication setup You can use SAP Landscape Management for
To give context - We are using HANA SSL certificates, which are valid for 1 year and before it gets expire we need to renew it, so we want to do Monitoring to get alerts of it either by Cockpit/ Splunk or other home grown tools via Perl/any other scripting, so any one knows more about it?? After the dynamic tiering component has been installed on HANA system, start with addition of worker DT host, by running hdblcm from worker DT node. Following parameters is set after configuring internal network between hosts. (1) site1 is broken and needs repair; Do you have similar detailed blog for for Scale up with Redhat cluster. a distributed system. You can also select directly the system view PSE_CERTIFICATES. Step 1. Communication Channel Security; Firewall Settings; . This optimization provides the best performance for your EBS volumes by Applications, including utility programs, SAP applications, third-party applications and customized applications, must use an SAP HANA interface to access SAP HANA. no internal interface found, listeninterface, .internal , KBA , HAN-DB , SAP HANA Database , Problem . By default, this enables security and forces all resources to use ssl. the same host is not supported. (Storage API is required only for auto failover mechanism). more about security groups, see the AWS 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. Switches system replication primary site to the calling site. System replication overview Replication modes Operation modes Replication Settings SAP HANA 1.0, platform edition Keywords. To learn In most case, tier 1 and tier 2 are in sync/syncmem for HA purepose, while tier 3 is used for DR. * Dedicated network for system replication: 10.5.1. Starting point: Using command line tool hdbnsutil: Primary : Stay healthy, This blog provides an overview of considerations and recommended configurations in order to manage internal communication channels among scale-out / system replications. Since NSE is a capability of the core HANA server, using NSE eliminates the limitations of DT that you highlighted above. Find SAP product documentation, Learning Journeys, and more. In the following example, ENI-1 of each instance shown is a member 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. 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. 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. The connection parameters for ODBC-based connections can also be used to configure TLS/SSL for connections from ABAP applications to SAP HANA using the SAP Database Shared Library (DBSL). Use Secure Shell (SSH) to connect to your EC2 instance at the OS level. Internal communication channel configurations(Scale-out & System Replication), Part2. communications. , Problem About this page This is a preview of a SAP Knowledge Base Article. Another thing is the maintainability of the certificates. For more information, see SAP HANA Database Backup and Recovery. SAP HANA attributes.ini daemon.ini dpserver.ini executor.ini global.ini indexserver.ini multidb.ini nameserver.ini statisticsserver.ini webdispatcher.ini xsengine.ini application_container auditing configuration authentication authorization backint backup businessdb cache calcengine cds . Ensure that host name-to-IP-address recovery. 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. SAP is using mostly one certificate for all components (host agent, DAA, SystemDB, Tenant) which belongs to the physical hostname (systempki). Tertiary Tier in Multitier System Replication, Operations for SAP HANA Systems and Instances, Enable / Disable Fullsync System
SAP HANA components communicate over the following logical network zones: Client zone to communicate with different clients such as SQL clients, SAP configure security groups, see the AWS documentation. For more information about how to create a new 4. Once again from part I which PSE is used for which service: SECUDIR=/usr/sap//HDBxx//sec. For more information, see Configuring Instances. To learn more about this step, see labels) and the suitable routing for a stateful connection for your firewall rules and network segmentation. For more information, see Assigning Virtual Host Names to Networks. Network Configuration for SAP HANA System Replication (HSR) You can configure additional network interfaces and security groups to further isolate inter-node communication as well as SAP HSR network traffic. Any changes made manually or by
can use elastic network interfaces combined with security groups to achieve this network Configure SAP HANA hostname resolution to let SAP HANA communicate over the 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. # 2021/03/18 Inserted XSA high security Kudos out to Patrick Heynen Search for jobs related to Data provisioning in sap hana or hire on the world's largest freelancing marketplace with 22m+ jobs. Surprisingly the TIER3 system replication status did not show up on the Replication monitor in HANA studio Most will use it if no GUI is available (HANA studio / cockpit) or paired with hdbuserstore as script automatism (housekeeping). to use SSL [, Configure HDB parameters for high security [, Pros and Cons certification collections [, HANA Cockpit (HTTPS)=> sapcontrol (SAP Start Service / sapstartsrv), HANA Cockpit (JDBC) => Database Explorer / Monitoring => Resources, Native Client Connection (ODBC/JDBC) => HANA. The values are visible in the global.ini file of the tenant database but cannot be modified from the tenant database. For more information about how to create and A service in this context means if you have multiple services like multiple tenants on one server running. HANA database explorer) with all connected HANA resources! Recently we started receiving the alerts from our monitoring tool: You just have to set the dbs/hdb/connect_property parameter to the correct value: In some cases, you may receive an error if you force the use of TLS/SSL: You have to set some tricky parameter due to the default gateway of the Linux server. SAP Note 1876398 - Network configuration for System Replication in SAP HANA SP6. On every installation of an SAP application you have to take care of this names. These steps helped resolve the issue and the System Replication monitor was now reflecting all 3 TIERS must be backed up. Scale-out and System Replication(3 tiers). isolation. network interface in the remainder of this guide), you can create Scale out of dynamic tiering is not available. Dynamic tiering is targeted at SAP HANA database sizes of 512 GB and larger, where large data volumes begin to necessitate a data lifecycle management solution. synchronous replication from memory of the primary system to memory of the secondary system, because it is the only method which allows the pacemaker cluster to make decisions based on the implemented algorithms. 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 Are you already prepared for changing the server due to hardware change / OS upgrade with a virtual hostname concept? Copy the commands and deploy in SQL command. operations or SAP HANA processes as required. Please use part one for the knowledge basics. Pipeline End-to-End Overview. Thanks for letting us know we're doing a good job! Terms of use |
HANA System Replication, SAP HANA System Replication
Storage snapshots cannot be prepared in SAP HANA systems in which dynamic tiering is enabled. Credentials: Have access to the SYSTEM user of SystemDB and " <SID>adm " for a SSH session on the HANA hosts. Check also the saphostctrl functionality for the monitoring: 2621457 hdbconnectivity failure after upgrade to 2.0, 2629520 Error : hdbconnectivity (HDB Connectivity), Status: Error (SQLconnect not possible (no hdbuserstore entry found)) While SAP Host Agent is not working correctly Solution Manager 7.2, Managed systems maintenance guide preparing databases. +1-800-872-1727. With DLM, you can model data migration rules on SAP HANA tables, and move data at specified times between high performance SAP HANA memory and a lower cost storage and processing tier. redirection. The cleanest way is the Golden middle option 2. Step 2. How you can secure your system with less effort? # 2021/04/26 added PIN/passphrase option for sapgenpse seclogin Connection to On-Premise SAP ECC and S/4HANA. You comply all prerequisites for SAP HANA system
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. 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. In this example, the target SAP HANA cluster would be configured with additional network ISSUE: We followed the SAP note 2183363, and updated the listeninterface and internal_hostname_resolution HANA parameters on our non prod systems in a similar scaleout setup. Maybe you are now asking for this two green boxes. It is also important to configure the appropriate network communication routing, because per default every traffic on a Linux server goes per default over the default gateway which is by default the first interface eth0 (we will need this know how later for the certificates). mapping rule : internal_ip_address=hostname. If this is not possible, because it is a mounted NFS share,
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