Using Serviceguard Extension for RAC, 9th Edition, September 2010

raw logical volume device file. Be sure to include the desired size in MB. Following is a sample
worksheet filled out. However, this sample is only representative. For different versions of the
Oracle database, the size of files are different. 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.
Storage Planning with CFS
With CFS, the database software, database files (control, redo, data files), and archive logs may
reside on a cluster file system visible by all nodes. Also, the OCR and vote device can reside on
CFS directories.
The following software needs to be installed in order to use this configuration:
• SGeRAC
• CFS
CFS and CVM are not supported on all versions of HP-UX (on HP-UX releases that support
them. See “About Veritas CFS and CVM from Symantec” (page 18)).
CAUTION: Once you create the disk group and mount point packages, you must administer
the cluster with CFS commands, including cfsdgadm, cfsmntadm, cfsmount, and cfsumount.
You must not use the HP-UX mount or umount command to provide or remove access to a
shared file system in a CFS environment. Using these HP-UX commands under these
circumstances is not supported. Use cfsmount and cfsumount instead.
If you use the HP-UX mount and umount commands, serious problems could occur, such as
writing to the local file system instead of the cluster file system. Non-CFS commands could cause
conflicts with subsequent CFS command operations on the file system or the Serviceguard
packages, and will not create an appropriate multi-node package, which means cluster packages
will not be aware of file system changes.
NOTE: For specific CFS Serviceguard Storage Management Suite product information refer to
your version of the HP Serviceguard Storage Management Suite Release Notes.
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 Multipathing) that 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
are sample worksheets 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.
ORACLE LOGICAL VOLUME WORKSHEET FOR LVM Page ___ of ____
===============================================================================
RAW LOGICAL VOLUME NAME SIZE (MB)
Oracle Cluster Registry: _____/dev/vg_ops/rora_ocr_____100___ (once per cluster)
Oracle Cluster Vote Disk: ____/dev/vg_ops/rora_vote_____20___ (once per cluster)
Oracle Control File: _____/dev/vg_ops/ropsctl1.ctl______110______
Planning Storage for Oracle 10g/11gR1/11gR2 RAC 33