Oracle Clusterware Startup Sequence - RAC Startup Sequence (OHASD, CSSD, GPNPD & CRSD) - Oracle RAC

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Here with one more topic on.
Oracle Clusterware Startup Sequence - RAC Startup Sequence (OHASD, CSSD, GPNPD & CRSD) - Oracle RAC:
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Interview Question?
ohasd process to start what it will look?
cssd to start what it will look?
crsd to start what it will look?
gpnp process to start what it will look?
Brief me about clusterware start-up sequence?
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(ora.crsd) - Primary daemon responsible for managing cluster resources.
CTSSD(ora.ctssd) - Cluster Time Synchronization Services Daemon
Diskmon(ora.diskmon)
ACFS (ASM Cluster File System) Drivers
Level 2: OHASD oraagent spawns:
MDNSD(ora.mdnsd) - Used for DNS lookup
GIPCD(ora.gipcd) - Used for inter-process and inter-node communication
GPNPD(ora.gpnpd) - Grid Plug & Play Profile Daemon
EVMD(ora.evmd) - Event Monitor Daemon
ASM(ora.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
#RAC #RACDaemons #OracleClustearwareStartupSequence #exadata #oracle #oracledatabase #oracledba #database #databaseperformanceIssue
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[@vivekkonnamkandath6532]

Excellent teaching . Thank you for this contribution 👏👏👏

[@mohammedmoizuddin7628]

Thanks for using easy language to explain RAC

[@007tsf]

Excellent explanation Mallik.
I've gone through the Oracle University cluster Administration course but was still confused about clsuterware startup sequence.. Your explanation helped me to understand it better than OU course. Thank you very much.

[@pratik2720]

This is the best videos for rac I came accross

[@Mallik034]

Thanks

[@hariram4u3]

Really appreciate for detailed explanation on startup sequence 👍

[@Mallik034]

Thank you

[@baskarbabu4015]

Great Explanation. Keep it up.

[@yashasyash2266]

Thank you for the explaination.
I have a better undertsnading of clustereare startup sequence

[@muthudhanush3873]

Nice

[@Mallik034]

Thanks

[@pratik2720]

Best class ever

[@vaibhavwankhade8306]

Thank you

[@Mallik034]

You're welcome

[@ramyasubramanian6207]

Really appreciate ur work

[@bharathkumar225]

Thanks Malik, Nice explanation.

[@Mallik034]

You are welcome

[@harsha4972]

Thank you so much for all your videos Malik. Really helpful 🤗

[@Mallik034]

Thank you.

[@9885970330]

Nice presentation. really helpful.thanks mallik .

[@Mallik034]

You are welcome

[@vinothkumar-sh4nh]

Great session

[@Eira.2010]

Nice video

[@Mallik034]

Thanks

[@ajay-jm1ni]

Thank you very nice explanation video.

[@mayurrahate]

Thanks for explaining

[@DurgaPrasad-ec4pj]

Great information ...Thanks a lot

[@sureshmnsamy3342]

Great explain
Thank You so much

[@Mallik034]

You are welcome!

[@samirmomin203]

Good Session.. Thank You

[@Mallik034]

You are welcome

[@madhuuppalapati]

greatly appreciate your efforts in making useful videos bro.

[@Mallik034]

It's my pleasure. Thanks a lot. please do share with your friends and colleagues.

[@tejarednam7896]

Thank you share such a valuable rac stuff

[@Mallik034]

It's my pleasure

[@BHARARHROYAL]

Nice explanation. I hope with in one year you will get 1M subscribers.

[@Mallik034]

Thank you.

[@ka10k]

Bharath Bharathkumar is this a joke? Oracle is not so popular to get 1m, maybe it is popular in India, but not all over the world.

[@ka10k]

Bharath Bharathkumar btw, did you know that 11g is not supported any more?

[@bharathkumar-ds8cd]

@@ka10k I agree with you but still same cluster startup process even 19c also. Please correct me am I wrong. @malli karjun

[@amandeepgera4109]

hi brother....please make videos on PT....real time scenarios ,,, explain plan , tkprof etc..

[@Mallik034]

Hey, If you see my performance tuning intro video. I have already mentioned them.
Please watch this video.
th-cam.com/video/5dYGhK2MqOk/w-d-xo.html
Please stay tuned, I will be uploading all those videos.

[@amandeepgera4109]

@@Mallik034 will be waiting

[@AsimKhan-ki7io]

Such bad English ... It's hard to understand!!

[@kikivalathati]

Nice

[@Mallik034]

Thank you