on 07-25-2010 3:25 PM
Hi
I have an existing SAP NW PI 7.0 (Abap + Java on Windows 2003 - SQLServer 2005) and plan to migrate to a cluster with new hardware (MSCS).
I have to prepare for the installation by creating a homogeneous copy of the database but I'm a little bit confused.
-Can I use backup/restore method or only can use import/export with R3load tools? The target system is windows and sql server same versions.
-If I can use backup/restore... what is the rigth sequence to the installation? Can I use sapinst with mixed high availability options and System copy options?
-I need to use in the target system the same hostname and IP address of the actual system, so in the Follow-Up Activities we do not change the configuration between the actual system (SAP NW PI) and other existent systems in the landscape... but I do not know what is the location in the cluster to this hostname and IP:
*The central instance will be in the local disks in the node 1. Is the node 1 the rigth option to use the hostname and IP of the actual system?
*The SAP Cluster group has a virtual hostname and IP, it has message and enqueu services. Is the sap cluster group he rigth option to use the hostname and IP of the actual system?
How is the communication between the other systemas and the new clustered system?
Thanks for your help
Can I use backup/restore method or only can use import/export with R3load tools? The target system is windows and sql server same versions.
You should follow the SAP guidlines in performing a homogeneous system copy.
I need to use in the target system the same hostname and IP address of the actual system, so in the Follow-Up Activities we do not change the configuration between the actual system (SAP NW PI) and other existent systems in the landscape... but I do not know what is the location in the cluster to this hostname and IP
This is not possible. If you follow the SAP instructions for installing NW 7.0 in MSCS you will create two cluster groups: DBGroup and SAPGroup. You will therefore have two virtual IP addresses, one for SAP cluster group and one for DB cluster group. If you retain the current IP address/hostname for the virtual SAPGroup, you will need to follow the SAP guidelines for performing a SAP system copy to find where to change the database hostname/IP addresses to point to your new DBGroup.
The central instance will be in the local disks in the node 1. Is the node 1 the rigth option to use the hostname and IP of the actual system?
If you are meaning the ASCS then this should be installed on the disks that are part of the SAPGroup in the cluster.
If you mean the dialog instance (or the Central Instance of a Java stack) then this can be on a local disk for node 1, and not in the cluster.
The SAP Cluster group has a virtual hostname and IP, it has message and enqueu services. Is the sap cluster group he rigth option to use the hostname and IP of the actual system
Yes, this will be the message server host for ASCS.
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Hi,
PI has the infamous dual stack architecture which makes all more complex and difficult.
>Can I use backup/restore method or only can use import/export with R3load tools? The target system is windows and sql server same versions
I would say that you can either use completely import/export or do a mix : restore for the ABAP schema owner and export/import for the JAVA schema owner. But I don't have experience of a PI system copy (we did not dare to do it...) but we used susccessfully the mixed option for a dual stack BI system (dual stack because of historical reasons, that was the SAP advice at the time and we regret a lot to have followed it...)
Youwill have to change the configuration of the external systems because they will now access the PI system from the MSCS SAP group virtual IOP address. So it is not really usefull to keep the same hostname and IP for one of the node.
It could be if you can use the old hostname and IP as the new virtual hostname and virtual IP but this is usually not the case because of network team norms.
>How is the communication between the other systemas and the new clustered system?
Same as before except it will use the virtual hostname and virtual IP of the PI system.
Regards,
Olivier
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