Application Server - DR site

[wlourens2]

Hi

We replicate the HANA database to the DR site using the HANA tools, please assist with the best process to create the SAP Application server and keep it in sync.

OS version: SUSE Linux 12 SP3

SAP version: ECC EHP8

Steps I tried, is I created the application server on the DR site with the same hostname as on PROD, then created the same users and groups as on PROD. I used RSYNC to copy the /home, /etc/services, /sapmnt and /usr/sap directories over. The DR application server starts up, I can login and the SAP Initial consistency check and SLICENSE transactions looks OK.

Question, is this a supported method?

I will schedule hourly RSYNC scripts for the file systems. In case of DR, I will fail over database, stop RSYNC scripts use hdbuserstore to point DR APP Server to DR database, request DNS to point hostname to DR ip address and start-up SAP.

[BJarkowski · Accepted solution]

Hello Willem,

noone else replied so let me try to answer 🙂

I think in general your approach is OK. As long as the server hostname is the same, it should work fine. DNS change is a popular way to failover to secondary site, but you need to ensure that none of SAP components is using IP addresses. I saw installations where after a DR some bits were not working as not everything relayed on hostname.

If you're running a virtual environemnt I think I would create a second server based on a copy. This way it's easy to ensure nothing is missed and the server config is exactly the same.

Remember that it is very important to test the DR. Even the best DR solution may fail if not tested carefully!

[wlourens2 · Accepted solution]

Great response thanks Bartosz