10.2.2 Pre-Installation Considerations

Before installing Sun Cluster with scinstall(1M), consider the following issues that apply to SAP configurations.

• Use a logging file system:

  • If your volume manager is SSVM, use VxFS and Dirty Region Logging.

  • If your volume manager is Solstice DiskSuite, use either Solaris UFS logging or Solstice DiskSuite UFS logging.

• Configure separate disk groups for SAP software and the database. The scinstall(1M) command cannot configure more than one disk group per logical host. Therefore, do not set up logical hosts with scinstall(1M) during initial cluster installation. Instead, set up logical hosts with scconf(1M), after the cluster is up. See the scconf(1M) man page for details.

• Limit physical host names and logical host names to eight characters or less.

• Do not configure any node to be an NFS client of another node within the same cluster.

• (For SAP 4.0x with Oracle) On all potential masters of the central instance logical host, set aside space in /var/opt/oracle for the Oracle client binaries. Roughly 140 Mbytes is required. See your SAP documentation for details.

See also "10.2.5 Sun Cluster HA for NFS Considerations", and "10.4 Preparing the SAP Environment".