Introduction

SAP HANA is fully designed for high availability as explained by Chaim Bendelac in his paper: Introduction to High Availability for SAP HANA.

System replication is a key technology in this design as it supports both disaster recovery, e.g. data center or site failure, and fault recovery, e.g. hardware failure.

We have just completed a series of video tutorials for the SAP HANA Academy that cover a wide range of topics related to system replication. You can find the full playlist here: SAP HANA System Replication – YouTube

This completes the product documentation and some excellent resources, like the System Replication How To Guide by Mechthild Bore-Wuesthof.

Concepts

The first video briefly discusses system replication concepts, RPO, RTO, etc.

Setup Replication

The next video demonstrates how to setup replication using SAP HANA studio or the command line tool HDBNSUTIL.

Full Sync

The next video explains the different replication modes and the full synch option.

Configuration Parameters

In the next video, the different configuration parameters are discussed.

Disable Replication

The next video, demonstrates how to properly disable system replication.

As discussed in SAP Note 1945676 – Correct usage of hdbnsutil -sr_unregister this needs to be done in the correct sequence.

Takeover

The next video, demonstrates how to perform a takeover.

For a decision guideline, see SAP Note: 2063657 – HANA System Replication takeover decision guideline

and SCN blogs: HANA System Replication – Take-over process; HANA System Replication – Switching back and forth

Near Zero Downtime Upgrade

The next demonstrates how you can use system replication for near zero downtime upgrades. I will show you how you can upgrade your secondary system from revision 90 (SPS 09) to revision 91, perform a takeover to the secondary, upgrade old primary, and reestablish the replication. Although not complicated, near zero downtime upgrades does require to perform the steps in the right order and using the correct command options.

1984882 – Using HANA System Replication for Hardware Exchange with minimum/zero Downtime

More Information

Product documentation

How to setup and manage system replication is documented in the SAP HANA Administration Guide (Chapter 4, Availability and Scalability)

SCN Blogs

How to Perform System Replication for SAP HANA

How To Configure Network Settings for HANA System Replication

Network Recommendations for SAP HANA System Replication

SAP HANA TDI – Network Requirements

HANA System Replication – Switching back and forth

Registering a Secondary system for System Replication – Troubleshooting

SAP HANA – Host Auto-Failover

SAP Notes

1945676 – Correct usage of hdbnsutil -sr_unregister

1984882 – Using HANA System Replication for Hardware Exchange with minimum/zero Downtime

1999880 – FAQ: SAP HANA System Replication

2063657 – HANA System Replication takeover decision guideline

1984882 – Using HANA System Replication for Hardware Exchange with minimum/zero Downtime

Thank you for watching

You can view more free online videos and hands-on use cases to help you answer the What, How and Why questions about SAP HANA and the SAP HANA Cloud Platform on the SAP HANA Academy at youtube.com/saphanaacademy, follow us on Twitter @saphanaacademy., or connect with us on LinkedIn.