Know about RAC Clusterware Process OPROCD
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OPROCD introduced in 10.2.0.4 Linux and other Unix platform.
- Fencing
- Cluster handling of nodes that should not have access to shared resources
- STONITH – Power cycle the node
- PCW – nodes fence themselves through the reboot(8) command
- Fabric Fencing from Polyserve
- Healthy nodes send SNMP msgs to Fabric switch to disable SAN access from unhealthy nodes [ fence them out ]
- Server is left in up state to view logs etc.
- Oracle's Cluster I/O Fencing solution
- Only started on