Things to Remember

Service Group: Collection of dependent Resources
Resource: Anything that the end user requires
Resource Type: Collection of the resources with same type
Agents: To manage the Resource Types (Start,Stop and Monitor)
Service Group Online: Child Resource to Parent Resource
Service Group Offline: Parent Resource to Child Resource

LLT Files
/etc/llthosts
/etc/llttab

GAB Files:
/etc/gabtab

Manipulating Service Groups:
1. hagrp -offline AppSG -sys S1 -localclus --> Offline the AppSG only in S1 system (node)
2. hagrp -offline OracleSG -any --> Offline the OracleSG in all the systems
3. hagrp -online AppSG -sys S2 -localclus --> Online the AppSG in node S2
4. hagrp -switch AppSG -to S1  -->  AppSG will be moved to node S1

Manipulating Resources:
1. hares -offline Oralistener -sys S3  -->  Bring offline the Oralistener resource in node S3
2. hares -online ipres -sys S2  ->  Bring online the ipres resource in node S2

Handling VCS services:
haconf -dump -makero --> sync the RAM's main.cf with hardisk's main.cf and make the status as Readonly

hastop -all --> Stop the application and cluster

hastop -all -force --> Application will be continue running but the cluster service has been stopped
hastop -local --> stop the cluster service in local node