Managing Serviceguard Extension for SAP on Linux (IA64 Integrity and x86_64), April 2009

4 SAP Supply Chain Management
Within SAP Supply Chain Management (SCM) scenarios two main technical components have to be
distinguished: the APO System and the liveCache
The first technical component, the APO System is based on SAP WAS technology. Therefore, (ci), (db),
(dbci), (d) and (sapnfs) packages may be implemented for APO. These APO packages are set up the
same way as the Netweaver packages. The only difference is that the APO system needs access to liveCache
client libraries and database binaries (e.g. dbmcli...). These files usually are searched via the path
/sapdb/programs.
The second technical SCM component, called liveCache, is an in-memory database. liveCache is based on
MaxDB database technology. SAP has defined a list of policies and requirements in order to allow support
for liveCache High Availability. Therefore a liveCache Serviceguard Extension for SAP on Linux package
does not use the generic (ci), (db), (dbci), (d) and (sapnfs) package templates. Instead a new Serviceguard
Extension for SAP on Linux template called (lc) will be introduced.
This chapter describes how to configure and setup SAP Supply Chain Management using a failover liveCache.
Topics are as follows:
▲ Planning the Volume Manager Setup
▲ Linux Setup
• Cluster Node Synchronization•
• Cluster Node Configuration
▲ Serviceguard Extension for SAP on Linux Package Configuration
• Package Creation•
• Service Monitoring
▲ APO Setup Changes
▲ General Serviceguard Setup Changes
The tasks are presented as a sequence of steps. Each mandatory installation step is accompanied by a
unique number of the format XXnnn, where nnn are incrementing values and XX indicates the step relationship,
as follows:
▲ LCnnn: LP Package Installation Steps
▲ GSnnn: 'General Installation Steps
Whenever appropriate, Linux sample commands are given to guide through the installation process in as
detailed a manner as possible. It is assumed that hardware as well as the operating system and Serviceguard
are already installed properly on all cluster hosts.
Sometimes a condition is specified with the installation step. Follow the information presented only if the
condition is true for your situation.
NOTE: For installation steps in this chapter that require the adjustment of SAP specific parameter in order
to run the SAP application in a switchover environment usually example values are given. These values are
for reference ONLY and it is recommended to read and follow the appropriate SAP OSS notes for SAP's
latest recommendation. Whenever possible the SAP OSS note number is given.
Planning the Volume Manager Setup
In the following, the liveCache (lc) package of Serviceguard Extension for SAP on Linux gets described. The
(lc) package was developed according to the SAP recommendations and fulfills all SAP requirements for
liveCache failover solutions.
liveCache distinguishes an instance dependant path (/sapdb/<LCSID>) and two instance independent
paths IndepData (/sapdb/data) and IndepPrograms (sapdb/programs).
Planning the Volume Manager Setup 107