crsd

CRSd manages the resources like starting and stopping the services and failing-over the application resources. It spawns separate processes to manage application resources.
CRS daemon has two modes of running. During startup and after a shutdown. During planned clusterware start it is started as ‘reboot’ mode. It is started as ‘restart’ mode after unplanned shutdown.
In reboot mode it ‘auto’ starts all the resources under its management. In restart mode it prevails the previous state and brings back the resources to it previous state before shutdown
Manages the Oracle Cluster Registry and stores the current known state in the Oracle Cluster Registry
Runs as ‘root’ on Unix and ‘LocalSystem’ on windows and automatically restarts in case of failure.
CRS requires the public interface, private interface and the Virtual IP (VIP) for the operation all these interfaces should be up and running, should be able to ping each other before starting CRS Installation. Without the above network infrastructure CRS cannot be installed.

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rac进程 crsd