SAP installation on High Availability (Cluster)

[Former Member]

I would like to ask you two basis questions for HA.

1. The development, Quality and production should be in same network

secured zone (SZ2). Is it best practice?

2.The directory /usr/sap/trans should be global mounted from

development to quality and then production system. Is it best SAP

deployment practice ?

3.Can the /usr/sap/trans will be part of my cluster settings in

production system or not? This is globally mounted from development

server. I have one concern here if development system is down and

production cluster is switch over then this global mount point will not

allow the system to switch over because the development directory

(/usr/sap/trans) is not available.

4. During the creating the mountpoint. It is recommended that all SAP and database mount points should be on SAN storagebox. In high cluster environment. The SAP mount points (/sapmnt, /usr/sap/SID is on CI system and (/oracle/SID/ , /oracle/10g , SAPDATA1 - SAPDATA2 , origlogA, origlogB, mirrorlogA, mirrorlogB ) will be created on DB server.

Pl confirm

Please suggest

Thanks in advance

Regards

Vimal Pathak

[Former Member]

Hi

DEV,QAS,PRD should be in same network.

Trans directory will be shared among DEV,QAS,PRD systems with proper permissions.

Generally, in HACMP (AIX systems) and Cluster(Windows) Archive files automatically copied to failover server using heart beat connection.

Distributed Environment is one on which DB instance and SAP instances are installed on different servers

advantage: I/O load on Database server is reduced, performace is good , but there is chance of non availbility if one fail

High Availblility is installtionis carried on two nodes by which is by any chance one fail other will take care

by this system will availble to end user all the time

You have to have a shared drive for CI,SCS abd DB on the shared drive something like SAN.

You will have HACMP the IBM Cluster SW shall be configured and installed properly.

DB and CI installation will be done by Basis normally.

Yes ,there is arequirement to install and db and OS Filesystems on shared drive.

you can look for inst guide at service.sap.com/instguides

you get more details from below docuements

Note 617037 - Windows Cluster Installation for SAP Web AS 6.30

Note 803018 - Central note for NetWeaver04 High Availability capabilities

Note 849791 - SAP NetWeaver 2004s High Availability (MSCS) on Windows

http://www.redbooks.ibm.com/redbooks/pdfs/sg246375.pdf

Regards

Nagaraj

[Former Member]

Dear Mr Nagaraj

Thanks . It would be better if you can reply point wise.

What will happen if development system is down and we started the cluster of production. Does cluster will come up or not ?

please note that /usr/sap/trans is globally.

Is this a best practice ?

Regards

Vimal