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/etc/default/vcs stores start and stop env variables for VCS

vcs_start - 1 indicates that vcs engine enabled to start upvcs_start - 0 indicates that vcs engine disabled to start up

cluster defnition includes the info you provided during configuration.

installvcs program creates a user "admin" password should be "password"

if I/O fencing future enabled, then UseFence=SCSI3 attribute is present.

The installvcs program creates the ClusterService service group if you configured the virtual IP, SMTP, SNMP, or global cluster options.The service group also has the following characteristics:The group includes the IP and NIC resources.The service group also includes the notifier resource configuration, which is based on your input to installvcs program prompts about notification.The installvcs program also creates a resource dependency tree.

vcs checking for cluster read/write mode# haclus -value ReadOnly

Convert main.cf to cmd

# hacf -cftocmd /etc/VRTSvcs/conf/config -dest /targetDIR

VCS architectureSo putting the above altogether we get:

Agents monitor resources on each system and provide status to HAD on the local system HAD on each system send status information to GAB GAB broadcasts configuration information to all cluster members LLT transports all cluster communications to all cluster nodes HAD on each node takes corrective action, such as failover, when necessary

http://rameshunix.blogspot.in/2014/06/vcs-cheat-sheet-complete.html