03 Set Up Shared Disks for RAC

Overview

In the design of REVESBY, shared disks are required to support the RAC environment.

References

• Readme for Media Pack B74025-01: Oracle VM Templates for Oracle Database Media Pack v1 for x86 (64 bit)
• Oracle VM Templates for Oracle Database
  • Oracle DB/RAC 12.1.0.1.0 VM templates Linux X86 64bit - Test Configuration
• How to share a XEN disk with two or more virtual machines
• dd(1) - Linux man page

Further Design Considerations

In Readme for Media Pack B74025-01, I am referred to Oracle VM Templates for Oracle Database which has a link to Oracle DB/RAC 12.1.0.1.0 VM templates Linux X86 64bit - Test Configuration which is an updated version of the PDF extracted from the uploaded files.

Name of Bridge for Second NIC

In the PDF about the test configuration, there is the following note:

IMPORTANT: Assign the second network adapter to xenbr1

p.13 of 40

This matches the configuration I created in 02 Set Up Networking for RAC.

Shared Virtual Disks

In the PDF about the test configuration, the sample configuration shows five (5) shared disks of two (2) GB each (p.17).

Procedure

Create the Shared Disks

On VICTORIA, run the following commands to create five (5) shared disks of 2GB each:

dd if=/dev/zero of=/OVS/sharedDisk/Revesby.ASM1.img bs=1M count=2048

dd if=/dev/zero of=/OVS/sharedDisk/Revesby.ASM2.img bs=1M count=2048

dd if=/dev/zero of=/OVS/sharedDisk/Revesby.ASM3.img bs=1M count=2048

dd if=/dev/zero of=/OVS/sharedDisk/Revesby.ASM4.img bs=1M count=2048

dd if=/dev/zero of=/OVS/sharedDisk/Revesby.ASM5.img bs=1M count=2048

Note: running dd with bs=1G fails with:

dd: memory exhausted