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 Pre 11R2 /etc/inittab h1:2:res

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

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 Instan本文来源[email protected]搞@^&代*@码)网9ce(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 –t可以查看所有component的状态

参考文档ID 1053147.1

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