101-RAC- Clusterware and Grid Home – What You Need to Know (Doc ID 1053147.1)

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101-RAC- Clusterware and Grid Home – What You Need to Know (Doc ID 1053147.1)
101-RAC- Clusterware and Grid Home – What You Need to Know (Doc ID 1053147.1)
Level 1: OHASD Spawns:
•cssdagent – Agent responsible for spawning CSSD.
•orarootagent – Agent responsible for managing all root owned ohasd resources.
•oraagent – Agent responsible for managing all oracle owned ohasd resources.
•cssdmonitor – Monitors CSSD and node health (along wth the cssdagent).

Level 2: OHASD rootagent spawns:
•CRSD – Primary daemon responsible for managing cluster resources.
•CTSSD – Cluster Time Synchronization Services Daemon
•Diskmon
•ACFS (ASM Cluster File System) Drivers

Level 2: OHASD oraagent spawns:
•MDNSD – Used for DNS lookup
•GIPCD – Used for inter-process and inter-node communication
•GPNPD – Grid Plug & Play Profile Daemon
•EVMD – Event Monitor Daemon
•ASM – Resource for monitoring ASM instances

Level 3: CRSD spawns:
•orarootagent – Agent responsible for managing all root owned crsd resources.
•oraagent – Agent responsible for managing all oracle owned crsd resources.

Level 4: CRSD rootagent spawns:
•Network resource – To monitor the public network
•SCAN VIP(s) – Single Client Access Name Virtual IPs
•Node VIPs – One per node
•ACFS Registery – For mounting ASM Cluster File System
•GNS VIP (optional) – VIP for GNS

Level 4: CRSD oraagent spawns:
•ASM Resouce – ASM Instance(s) resource
•Diskgroup – Used for managing/monitoring ASM diskgroups.
•DB Resource – Used for monitoring and managing the DB and instances
•SCAN Listener – Listener for single client access name, listening on SCAN VIP
•Listener – Node listener listening on the Node VIP
•Services – Used for monitoring and managing services
•ONS – Oracle Notification Service
•eONS – Enhanced Oracle Notification Service
•GSD – For 9i backward compatibility
•GNS (optional) – Grid Naming Service – Performs name resolution

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Regards,
Mallikarjun Ramadurg
Mobile: 91 9880616848
WhatsApp: 91 9880616848

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