SAP How-to Guide SAP HANA™ Network Configuration for SAP HANA System Replication Applicable Releases: SAP HANA 1.0 & SAP HANA 2.0 Version 2.2 December 2018 For additional information contact: [email protected] © Copyright 3 SAP AG. All rights reserved. All other product and service names mentioned are the trademarks of No part of this publication may be reproduced or transmitted in any form their respective companies. Data contained in this document serves or for any purpose without the express permission of SAP AG. The informational purposes only. National product specifications may vary. information contained herein may be changed without prior notice. The information in this document is proprietary to SAP. 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Note or Important These include field Example names, screen titles, pushbuttons labels, Recommendation or menu names, menu Tip paths, and menu options. Cross-references to other documentation Example text Emphasized words or phrases in body text, graphic titles, and table titles Example text File and directory names and their paths, messages, names of variables and parameters, source text, and names of installation, upgrade and database tools. Example text User entry texts. These are words or characters that you enter in the system exactly as they appear in the documentation. <Example Variable user entry. text> Angle brackets indicate that you replace these words and characters with appropriate entries to make entries in the system. EXAMPLE TEXT Keys on the keyboard, for example, F2 or ENTER. Table of Contents 1. Before you start ............................................................................................ 1 2. Scale-out network configuration .................................................................. 1 2.1 Virtual hostnames ................................................................................... 1 2.2 Find out the internal hostnames ............................................................ 2 2.3 Internal hostname resolution ................................................................. 2 3. System replication network configuration .................................................. 3 3.1 System Replication Hostname Resolution ........................................... 3 Network Configuration for SAP HANA System Replication 1. Before you start It is recommended to have read the SAP HANA system replication sections in the following documents: • SAP HANA Master Guide: Hostname Resolution for System Replication & Internal Hostname Resolution You should also be aware of these SAP notes containing valuable information on SAP HANA system replication: • SAP Note 2407186 - How-To Guides & Whitepapers For SAP HANA High Availability • SAP Note 1876398 - Network configuration for System Replication in HANA SP6 • SAP Note 1969700 - SQL statement collection for SAP HANA (containing “replication” relevant SQL statements in the attachment) •• 2. Scale-out network configuration If nothing else is configured during the installation of SAP HANA, the hostnames known to the operating system1 are used as HANA hosts – called internal hostnames. For all communication between the SAP HANA services (index server, name server, …) these internal host names are used. This applies for the internal host communication in a scale-out HANA as well as for the replication host communication in a SAP HANA system replication configuration. 2.1 Virtual hostnames During the installation of SAP HANA, you can also specify alternative HANA host names – called virtual hostnames as HANA internal hostnames. To specify virtual hostnames during installation, use the following option with the installation tool hdblcm: hdblcm … --hostname=<virtualhostname>