Managing Serviceguard Extension for SAP Version B.05.10, September 2010

Table of Contents
Printing History...................................................................................................................9
About this Manual..................................................................................................................................9
Related Documentation........................................................................................................................10
1 Designing SGeSAP Cluster Scenarios........................................................................11
General Concepts of SGeSAP...............................................................................................................11
Mutual Failover Scenarios Using the Two Package Concept...............................................................12
Robust Failover Using the One Package Concept................................................................................15
Follow-and-Push Clusters with Replicated Enqueue...........................................................................16
Dedicated NFS Packages.......................................................................................................................18
Dialog Instance Clusters as Simple Tool for Adaptive Enterprises......................................................18
Handling of Redundant Dialog Instances............................................................................................20
Dedicated Failover Host.......................................................................................................................21
2 Planning the Storage Layout.......................................................................................23
SAP Instance Storage Considerations...................................................................................................23
Option 1: SGeSAP NFS Cluster.......................................................................................................24
Common Directories that are Kept Local...................................................................................24
Directories that Reside on Shared Disks....................................................................................25
Option 2: SGeSAP NFS Idle Standby Cluster..................................................................................26
Common Directories that are Kept Local...................................................................................26
Directories that Reside on Shared Disks....................................................................................27
Option 3: SGeSAP CFS Cluster........................................................................................................28
Common Directories that are Kept Local...................................................................................28
Directories that Reside on CFS...................................................................................................28
Database Instance Storage Considerations...........................................................................................29
Oracle Single Instance RDBMS........................................................................................................29
Oracle databases in SGeSAP NFS and NFS Idle Standby Clusters...........................................29
Oracle Real Application Clusters....................................................................................................31
MAXDB Storage Considerations.....................................................................................................32
DB2 Storage Considerations............................................................................................................35
3 Step-by-Step Cluster Conversion.................................................................................37
SAP Preparation....................................................................................................................................39
SAP Pre-Installation Considerations...............................................................................................39
SAP Netweaver High Availability.............................................................................................39
Replicated Enqueue Conversion.....................................................................................................43
Splitting an ABAP Central Instance...........................................................................................44
Creation of Replication Instance................................................................................................47
HP-UX Configuration...........................................................................................................................49
Directory Structure Configuration..................................................................................................50
Cluster Filesystem Configuration..............................................................................................50
Non-CFS Directory Structure Conversion.................................................................................53
Cluster Node Synchronization........................................................................................................56
Cluster Node Configuration............................................................................................................60
External Application Server Host Configuration............................................................................62
Modular Package Configuration..........................................................................................................63
Graphical interface for modular package creation..........................................................................63
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