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Document History
Document
Version
Description
1.0
First official release of this guide
1.1
Small updates and language edit
1.2
Some descriptions were corrected
2.0
Update with SPS07 and SPS08 features
2.3
Minor corrections
2.4
Secondary site usage for QA/DEV – small update
2.6
Reference to docu on e-mail notification for alerts
3.0
Update with SPS09 features
3.1
Minor corrections
3.2
Fixed return codes of systemReplicationStatus.py
3.3
Updated network settings & sr_state output
3.4
Corrected system replication hostname resolution
3.5
Update with SPS10 features
4.0
Update with SPS11 features & minor corrections
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Table of Contents
1.
Business Scenario ........................................................................................ 1
2.
Before you start ............................................................................................ 1
3.
Background Information ............................................................................. 2
3.1 High Availability ....................................................................................... 2
3.2 System Replication ................................................................................. 3
3.2.1 Replication modes ....................................................................... 4
3.2.2 Operation modes ......................................................................... 4
3.2.3 Data transferred to the secondary ............................................. 5
3.3 Takeover .................................................................................................. 6
4.
Planning ........................................................................................................ 7
4.1 Prerequisites ........................................................................................... 7
4.2 Distance between data centers ............................................................. 8
4.3 Use secondary site for DEV/QA system ............................................... 8
4.4 License Validity ....................................................................................... 9
5.
Configuration steps ..................................................................................... 9
5.1 Configure system replication ............................................................... 10
5.1.1 Using SAP HANA studio ............................................................ 10
5.1.2 Using command line tool hdbnsutil ...................................... 13
5.1.3 Creating a tenant DB in a running system replication ............. 14
5.2 Disable system replication ................................................................... 14
5.2.1 Using SAP HANA studio ............................................................ 14
5.2.2 Using command line tool hdbnsutil ...................................... 15
5.3 Setting up Multitier System Replication ............................................. 15
5.3.1 Using SAP HANA studio ............................................................ 16
5.3.2 Using command line tool hdbnsutil ...................................... 17
5.4 Enabling full sync replication ............................................................... 18
6.
Takeover..................................................................................................... 18
6.1 Perform Takeover ................................................................................. 18
6.1.1 Using SAP HANA studio ............................................................ 19
6.1.2 Using command line tool hdbnsutil ..................................... 20
6.2 Client connection recovery ................................................................. 20
7.
Resync optimization ................................................................................... 21
7.1 Data Retention ...................................................................................... 21
7.2 Log Retention ........................................................................................ 21
7.2.1 Log Retention for Secondary Disconnect (on primary) .......... 21
7.2.2 Log Retention for Failback (on secondary) .............................. 23
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