Managing HP Serviceguard Extension for SAP for Linux, December 2013

Contents
1 Overview..................................................................................................7
1.1 About this manual................................................................................................................7
1.2 Related documentation.........................................................................................................8
2 SAP cluster concepts...................................................................................9
2.1 SAP-specific cluster modules..................................................................................................9
2.2 Configuration restrictions....................................................................................................11
2.3 Example 1: Robust failover using the one package concept.....................................................11
2.4 Example 2: A mutual failover scenario.................................................................................13
2.5 Example 3: Follow-and-push with automated enqueue replication............................................14
2.6 Example 4: Realization of the SAP-recommended SPOF isolation.............................................17
2.7 Example 5: Dedicated failover host.....................................................................................17
2.8 Example 6: Scale-out HANA System Replication and Dual-purpose.........................................18
2.9 Dedicated NFS packages..................................................................................................20
2.10 Virtualized dialog instances for adaptive enterprises.............................................................21
2.11 Handling of redundant dialog instances..............................................................................21
3 SAP cluster administration..........................................................................23
3.1 Performing cluster administration on the System Management Homepage (SMH).......................23
3.2 Performing SAP administration with SAP's startup framework .................................................25
3.3 Change management........................................................................................................29
3.3.1 System level changes..................................................................................................29
3.3.2 SAP software changes...............................................................................................30
3.4 Ongoing verification of package failover capabilities............................................................31
3.5 Upgrading SAP software...................................................................................................32
3.6 Package conversion..........................................................................................................32
3.7 SAP HANA cluster administration.......................................................................................33
3.7.1 Starting and stopping the primary HANA system............................................................33
3.7.2 Starting and stopping of the secondary HANA system....................................................33
3.7.3 Manual operations on the production system.................................................................34
3.7.4 Planned extended downtime for HANA instance............................................................35
3.7.5 Patching Serviceguard software on a node....................................................................35
4 SAP Netweaver cluster storage layout planning............................................37
4.1 SAP Instance storage considerations....................................................................................37
4.1.1 Option 1: SGeSAP NFS cluster.....................................................................................37
4.1.1.1 Common directories that are kept local...................................................................38
4.1.1.2 Directories that Reside on Shared Disks..................................................................38
4.1.2 Option 2: SGeSAP NFS idle standby cluster..................................................................41
4.1.2.1 Common directories that are kept local..................................................................41
4.1.2.2 Directories that reside on shared disks...................................................................42
4.2 Database instance storage considerations............................................................................42
4.3 Oracle single instance RDBMS...........................................................................................43
4.3.1 Oracle databases in SGeSAP NFS and NFS Idle standby clusters.....................................43
4.4 MaxDB/liveCache storage considerations............................................................................44
4.5 Sybase ASE storage considerations.....................................................................................47
4.6 IBM DB2 storage considerations.........................................................................................47
4.7 Special liveCache storage considerations.............................................................................47
4.7.1 Option 1: Simple cluster with separated packages..........................................................48
Contents 3