The document describes the Oracle RAC architecture. It discusses the typical hardware configuration including shared storage, and the software deployment including Oracle Grid Infrastructure, Oracle Clusterware, and Oracle Automatic Storage Management. It also provides an overview of the Oracle Grid Infrastructure processes and lists some local and cluster resources.

1. Oracle RAC Architecture
Real Application Cluster
Mallik

2. The Oracle RAC Architecture
•Typical hardware architecture
Interconnect
with switch
Public Lan
SAN switch
Client
Shared Storage
Network
Node 1 Node 2 Node N
Node N-1

3. The Oracle RAC Architecture
•Typical software deployment 11g Release 2
Shared Storage
OS OS OS OS
Oracle Grid Infrastructure
Oracle Real Application Clusters (RAC)

4. The Oracle RAC Architecture
•Typical software deployment 11g Release 2
Oracle ASM managed
Shared Storage
OS OS OS OS
Oracle Automatic Storage Management (ASM)
Oracle Clusterware
Oracle Real Application Clusters (RAC)

5. The Oracle RAC Architecture
•Oracle RAC 11g Release 2 per node layer
OS OS
Oracle Grid
Infrastructure
Node
Membershi
p
HA
Framework
ASM
Instance
OS
Oracle RAC
DB Instance
Oracle ASM managed
Shared Storage
• Oracle Clusterware files
• Voting Files (disks)
• Cluster Registry
(OCR)
• Database Files
• Redo / Archive Logs
• Control Files
• etc.
• Cloud File System
(aka ASM Cluster File
File System - ACFS)
• For all other files
• 11.2.0.3: For Backup
Sets

6. The Oracle RAC Architecture
•Oracle Grid Infrastructure 11g Release 2 process
overview
OS OS
Oracle Grid
Infrastructure
Node
Membershi
p
HA
Framework
ASM
Instance
OS
• My Oracle Support (MOS)
• Note 1053147.1 - 11gR2 Clusterware
and Grid Home - What You Need to Know
• Note 1050908.1 - How to Troubleshoot
Grid Infrastructure Startup Issues

7. The Oracle RAC Architecture
•Local and Cluster Resources (11.2.0.2 list)
OS OS OS OS
Oracle Grid Infrastructure
ora.asm
ora.dgname.dg
ora.listener.lsnr
ora.ons
ora.gsd
ora.net1.network
ora.registry.acfs
ora.asm
ora.dgname.dg
ora.listener.lsnr
ora.ons
ora.gsd
ora.net1.network
ora.registry.acfs
ora.asm
ora.dgname.dg
ora.listener.lsnr
ora.ons
ora.gsd
ora.net1.network
ora.registry.acfs
ora.asm
ora.dgname.dg
ora.listener.lsnr
ora.ons
ora.gsd
ora.net1.network
ora.registry.acfs
LISTENER_SCAN
1
ora.SCAN1.VIP
ora.node1.vip
LISTENER_SCAN
2
ora.SCAN2.VIP
ora.node2.vip
LISTENER_SCAN
3
ora.SCAN3.VIP
ora.node3.vip
ora.oc4j
ora.cvu
ora.node4.vip
If database is deployed:
• ora.Dbname.db
• ora.Dbname.Srvcname.sv
c
Command to list:
• crsctl stat res -t