Forget to set environment variable export SAPINST_USE_HOSTNAME

Dear Experts
we have installed the SAP ECC6.0 EhP4 in HACMP environment with AIX6.1 ,Power HA cluster6.1, oracle 11g database
the problem is while installing the CI and ASCS and Dialog instance I missed to set environment variable
export SAPINST_USE_HOSTNAME = <virtual Host Name> and while starting the sap-inst also i didn't start as like
./sapint SAPINST_USE_HOSTNAME = <virtual Host Name>,Now i am facing problem while doing cluster fail over to another node
Node A host Name is not reflecting in Node B and I am not able to start the SAP with host name of Node A
in AIX6.1 in IBM Admin they didnt give any virtual host name they said that they have configured the cluster with two service IP there is no virtual IP in AIX6.1
please help me out how to resolve this host Name issue and to start the SAP in Node B
Thanks in Advance
krishna

Hi Krishna,
I dont agree with the AIX 6.1 having no virtual ip's, because i recently installed a HA instance with ASCS, SCS & also ERS on 6.1
to answer your questions:-
"can you tell is this correct setup or anything we did mistake for file system setup and installation"
This depends on what your requirement is. Typically a cluster will have Oracle on one host and SAP on the other host. Ill explain the VCS concept, so you will have a better understanding.
Lets consider Node1 & Node2. Now each node will have a physical IP and a virtual IP. The Virtual IP will be associated with a set of file systems. For example /oracle will be associated to virtual ip lets say "xyzDB" & the /usr/sap/<sid>, TRANS & sap mount will be associated with virtual ip lets say "abcCI". Now when the cluster fails over to which ever node, these file systems will still be associated with their respective virtual ip's.
So, the start profile will always have START_DVEBMGS_abcCI. Irrespective of which Node the sap is in, when you start the SAP, it will use the virtual hostname and start up SAP. I hope your getting the concept.?
Coming back to the setup, since you have ASCS, Oracle , CI & a dialog instance. Im not sure what file systems you have associated with VCS groups. Can you give command "hastatus -sum" and post the output?
Regarding your other question
"this file system is moving to Node B but while starting SAP on Node B host Name is not reflecting and SAP is not coming up due to there hostname didnt change in Node B,, can you advice me please ,,"
This is inline with what i explained above for cluster mechanism. The physical IP will not change. It is only the virtual IP that is associated with a set of file systems.
Ill give you one more example, Consider the parameter rdisp/mshost = <> . What should this be? Physical host or Virtual host?? :-) .It should be Virtual. Because the CI can be in Node1 or Node2. If we give the physical host, then if the SAP fails over to the other node. How will it start up? because the profiles still say the message server is in the other host... Getting my point?
Regards,
Shanser

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#1 05-02-2003, 07:38 AM
Goodz13 Join Date: Jan 2002, Posts: 985
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