Something about SAP system installed on Linux with...

former_member459694 · ‎01-13-2014

Hello all,

We are planning to migrate our old SAP system from old platform to the new one, it will be a heterogeneous migration that the operating system will be changed to Linux. Here I have several questions:

1. We would like to installed as HA with two nodes, for Windows I know that we can use MSCS for cluster software, but for Linux, could you kindly let me know how we can establish the HA environment? the HA software was integrated in the linux distribution or we should buy 3rd party tools?

2. We will use oracle database, is it possible and is it necessary that we install Oracle database on RAC? How difficult it would be??

3. I don't know much about RAC, is it the HA method for oracle database? As I know if we install SAP on HA, both SAP system and oracle database should be setup as HA, does SAP provide the HA method for oracle database? or we must use RAC? or the way SAP provide for oracle HA is exactly - RAC?

4. For HA environment, I have installed on Windows MSCS, but actually I found that failover doesn't working, for example, if I am currently logged on hostA, and then hostA was corrupted, then, all resources were failover from hostA to hostB, but my SAPGUI screen doesn't change to hostB smoothly, instead it got stuck and no response, I should re-logon SAPGUI to logon to the system (hostB). I would like to know whether it is normal or abnormal? for each time hostA got crash, the users logged in hostA will be stuck?

Thanks a lot for all.

Fresh man

ahmed_ibrahim2 · ‎01-13-2014

Dear Fresh ,


lled as HA with two nodes, for Windows I know that we can use MSCS for cluster software, but for Linux, could you kindly let me know how we can establish the HA environment? the HA software was integrated in the linux distribution or we should buy 3rd party tools?

it Might be Integrated to the OS (add-on) Like RedHat Cluster Suite , SUSE , Oracle or 3rd Party like

Verita High Availability Agent

check the following links

The name of the High Availability partner solution

Deploying Highly Available SAP Servers using Red Hat Clustering -- Example

http://www.redhat.com/rhecm/rest-rhecm/jcr/repository/collaboration/jcr:system/jcr:versionStorage

/317745cf0a05260143c0ce…

installation with SUSE

http://www.novell.com/docrep/2012/07/sap_solutions_high_availability_on_SLES_for_sap_apps.pdf



2. We will use oracle database, is it possible and is it necessary that we install Oracle database on RAC? How difficult it would be??

it is possible but not necessary to Install Oracle DB on RAC , as it will required more HW, if you use it with any other HA solution (RAC is only Solution for Oracle DB )

http://www.oracle.com/technetwork/database/options/clustering/rac-wp-12c-1896129.pdf



3. I don't know much about RAC, is it the HA method for oracle database? As I know if we install SAP on HA, both SAP system and oracle database should be setup as HA, does SAP provide the HA method for oracle database? or we must use RAC? or the way SAP provide for oracle HA is exactly - RAC?

Yes it is HA Solution for Oracle Database only, and SAP Provide Guides for all type of Installation with Different OS /DB combinations.

HA solutions like RedHat suite or SUSE .........etc Consider Oracle DB is one service it will move between nodes like any other services (CI , ASCS , ENQ and Database what ever this DB ) , so no use foe RAC unless you are looking for different Level Of availability

http://service.sap.com/instguides

Best Reagrds

AhMeD