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Thread: RAC 11gR2 clusterware Startup

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    Thumbs up RAC 11gR2 clusterware Startup

    Init starts Oracle High Availability Services Daemon (OHASD).

    Lev 1 OHASD Starts:
    Lev 2 - > csssdagent - Starts, stops, and checks the status of the CSS daemon, ocssd.
    Lev 3 - > ora.cssd : Cluster Synchronization Services


    Lev 2 -> orarootagent – Helps crsd manage resources owned by root, such as the network, and the Grid virtual IP address.
    Lev 3 - > ora.cssdmonitor : Monitors CSSD and node health (along with the cssdagent). Try to restart the node if the node is unhealthy.

    Lev 4 -> ora.ctssd : Cluster Time Synchronization Services Daemon
    Lev 4 -> ora.crsd
    Lev 5 -> oraagent
    Lev 6 -> ora.LISTENER.lsnr
    -> ora.LISTENER_SCAN.lsnr
    -> ora.ons
    -> ora.eons
    -> ora.asm
    -> ora.DB.db

    Lev 5 -> ->orarootagent
    Lev 6 -> ora.nodename.vip
    -> ora.net1.network
    -> ora.gns.vip
    -> ora.gnsd - Disbled in 11gR2
    -> ora.SCANn.vip

    Lev 2 oraagent –
    Lev 3 -> ora.mdnsd : Used for DNS lookup
    Lev 3 -> ora.evmd : Event monitor daemon
    Lev 3 -> ora.asmd : Resource for monitoring ASM instances
    Lev 3 -> ora.gpnpd : Grid Plug and Play = adding a node to the cluster is easier (we need less configuration for the new node)
    Lev 3 -> ora.gipcd – Currently has no functionality, will be activated in later releases.

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