Best Practices for SGeRAC and Oracle RAC on HP-UX 11i, March 2009

For online changes, CFS/CVM supports online reconfiguration of disk groups, volumes, file system,

and nodes.

For shared storage access failure, the CVM I/O timeout default value is 30 seconds for each link.

CVM

The preferred storage configuration with CVM is as follows:

• DG/local file system for Oracle Clusterware home

• DG/local file system for Oracle home

• CVM DG for OCR and Voting Disk

• CVM DG for Oracle RAC database data files

o Recommendation: one DG per database

• DG/local FS for flash recovery and/or archive destination

o Recommendation: one DG per database

o Can be placed in shared storage with failover package so that node performing

Oracle recovery can have access to all archive logs

For online changes, CVM supports online reconfiguration of disk groups, volumes, and nodes.

SLVM

The preferred storage configuration for SLVM is as follows:

• VG/local FS for Oracle Clusterware home

• VG/local FS for Oracle home

• SLVM VG for OCR and Voting Disk

• SLVM VG for Oracle RAC database data files

o Recommendation: one VG per database

• VG/local FS for flash recovery and/or archive destination

o Recommendation: one VG per database

o Can be placed in shared storage failover package so that node performing Oracle

recovery can have access to all archive logs

For online changes, SLVM supports online volume reconfiguration through SNOR (single node online

reconfiguration), online addition of new volume groups, and online node additions.

Changes through SNOR require deactivation of the SLVM volume group on all but one node.

Therefore, applications using the SLVM volume group must halt on all but one node.

ASM over raw devices

SGeRAC supports ASM over raw devices. The ASM disk groups members can be shared raw

devices.

• ASM supports

o Data files, control files, online and archive redo log files, and backup files.

• ASM does not support

o Oracle binaries, trace files, audit files, alert logs, export files, tar files, core files

o Oracle cluster registry devices (OCR) and quorum device (Voting Disk)

o Application binaries and data