Oracle 11gR2 clusterware启动顺序

从1gR2起Oracle引入init.ohasd,将其配置在/etc/inittab中,用以启动和管理clusterware相关资源

wKiom1OEAlGwM8wEAAHQIjmX2aU478.jpg

Pre 11R2


/etc/inittab


h1:2:respawn:/etc/init.evmd run >/dev/null 2>&1 </dev/null


h2:2:respawn:/etc/init.cssd fatal >/dev/null 2>&1 </dev/null


h3:2:respawn:/etc/init.crsd run >/dev/null 2>&1 </dev/null


$ who -r


  .       run-level 2 Jan 22 05:49      2   0   S


11R2


/etc/inittab


h1:2:respawn:/etc/init.ohasd run >/dev/null 2>&1 </dev/null


oracle> who -r


  .       run-level 2 Jul 03 07:52      2   0   S


 


clusterware资源大致可分为4级,其相应启动顺序如下:


先由INIT启动init.ohasd,后者再启动相应的4个进程,然后按顺序依次启动


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

调用crsctl status resource �Ct可以查看所有component的状态


你可能感兴趣的:(oracle学习,OCP,ocm,cuug官网,oracle官网)