Managing Serviceguard Extension for SAP, December 2007

SAP Master Data Management (MDM)
Installation and Configuration Considerations
Chapter 5 245
NOTE The advantage of the NFS server/client approach from a system
management viewpoint is only one copy of all the MDM server files have
to be kept and maintained on the cluster instead of creating and
distributing copies to each cluster node. Regardless of on which node any
of the MDM server components are running in the cluster - the MDM
server files are always available in the /home/mdmuser directory.
The disadvantage: I/O performance might become a bottleneck. Should
IO performance become an issue then it would become necessary to split
and to create local/relocatable file systems for /home/mdmuser/mds,
/home/mdmuser/mdss, /home/mdmuser/mdis.
/opt/MDM
The /opt/MDM mount point is used for storing the binaries of the MDM
servers. These are static files installed once during the installation. In
this specific cluster configuration each cluster node had it’s own copy of
the /opt/MDM file system. The /opt/MDM only contains a few files and
because of it’s small size, a separate storage volume / mount point was
not created but instead kept in the existing /opt directory. The
disadvantage here is a copy has to be maintained (for each software
installation) on each cluster member. From a system management an
alternative approach would be to configure /opt/MDM as an NFS file
system.