Using Serviceguard Extension for RAC, 5th Edition, June 2007

Serviceguard Configuration for Oracle 10g RAC
Planning Storage for Oracle 10g RAC
Chapter 2 53
Volume Planning with CVM
Storage capacity for the Oracle database must be provided in the form of
volumes located in shared disk groups. The Oracle software requires at
least two log files for each Oracle instance, several Oracle control files
and data files for the database itself. For all these files, Serviceguard
Extension for RAC uses HP-UX raw volumes, which are located in disk
groups that are shared between the nodes in the cluster. High
availability is achieved by using high availability disk arrays in RAID
nodes. The logical units of storage on the arrays are accessed from each
node through multiple physical volume links via DMP (Dynamic
Multi-pathing), which provides redundant paths to each unit of storage.
Fill out the Veritas Volume worksheet to provide volume names for
volumes that you will create using the Veritas utilities. The Oracle DBA
and the HP-UX system administrator should prepare this worksheet
together. Create entries for shared volumes only. For each volume, enter
the full pathname of the raw volume device file. Be sure to include the
desired size in MB. Following is a sample worksheet filled out. Refer to
Appendix B, “Blank Planning Worksheets,” for samples of blank
worksheets. Make as many copies as you need. Fill out the worksheet
and keep it for future reference.