Sun Cluster Data Service for Oracle RAC Guide for Solaris OS

Optimizing the Performance of the Sun StorageTek QFS Shared File System

For optimum performance with Solaris Volume Manager for Sun Cluster, configure the volume manager and the file system as follows:

Mirroring the LUNs of your disk arrays involves the following operations:

The input/output (I/O) load on your system might be heavy. In this situation, ensure that the LUN for Solaris Volume Manager metadata or hardware RAID metadata maps to a different physical disk than the LUN for data. Mapping these LUNs to different physical disks ensures that contention is minimized.