User's Guide

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.......................................................................................14
Follow-and-Push Clusters with Replicated Enqueue.....................................................................................15
Dedicated NFS Packages.......................................................................................................................17
Dialog Instance Clusters as Simple Tool for Adaptive Enterprises..................................................................17
Handling of Redundant Dialog Instances..................................................................................................18
Dedicated Failover Host.........................................................................................................................19
2 Planning the Storage Layout.......................................................................21
SAP Instance Storage Considerations.......................................................................................................21
Option 1: SGeSAP NFS Cluster..........................................................................................................22
Common Directories that are Kept Local.........................................................................................22
Directories that Reside on Shared Disks.........................................................................................23
Option 2: SGeSAP NFS Idle Standby Cluster.......................................................................................24
Common Directories that are Kept Local.........................................................................................24
Directories that Reside on Shared Disks.........................................................................................25
Option 3: SGeSAP CFS Cluster..........................................................................................................25
Common Directories that are Kept Local.........................................................................................26
Directories that Reside on CFS......................................................................................................26
Database Instance Storage Considerations...............................................................................................26
Oracle Single Instance RDBMS..........................................................................................................27
Oracle databases in SGeSAP NFS and NFS Idle Standby Clusters....................................................27
Oracle Real Application Clusters........................................................................................................28
MAXDB Storage Considerations........................................................................................................29
3 Step-by-Step Cluster Conversion..................................................................33
SAP Preparation....................................................................................................................................35
SAP Pre-Installation Considerations.....................................................................................................35
SAP Netweaver High Availability..................................................................................................35
Replicated Enqueue Conversion.........................................................................................................38
Splitting an ABAP Central Instance................................................................................................39
Creation of Replication Instance....................................................................................................42
HP-UX Configuration..............................................................................................................................45
Directory Structure Configuration........................................................................................................46
Cluster Filesystem Configuration....................................................................................................46
Non-CFS Directory Structure Conversion........................................................................................48
Cluster Node Synchronization............................................................................................................51
Cluster Node Configuration...............................................................................................................54
External Application Server Host Configuration....................................................................................56
Modular Package Configuration..............................................................................................................57
Legacy Package Configuration................................................................................................................65
Serviceguard Configuration...............................................................................................................65
SGeSAP Configuration.....................................................................................................................69
Specification of the Packaged SAP Components..............................................................................69
Configuration of Application Server Handling................................................................................72
Optional Parameters and Customizable Functions...........................................................................76
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