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
- 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