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In a Cluster File System (CFS) cluster with Clustered Network File System (CNFS) configured with a single virtual IP, the following are the Cluster Server (VCS) service groups:
cvm: This service group controls the Cluster Volume Manager (CVM) and the CFS shared resources. This group is automatically created during the configuration phase of CFS installation. This service group manages CVM and the basic CFS functionality that is provided through vxfsckd.
cfsnfssg: This service group contains the CFS mount resources for the NFS share as well as the shared CFS mount resources that are needed for lock management. This service group consists of the NFS resource and the share resource apart from the CVMVoldg and the CFSMount resources.
vip1: This service group contains the virtual IP and the NIC resources needed by NFS clients to connect. The virtual IP service group fails over from one node to another during system failover. Typically, more than one virtual IP is assigned per CNFS cluster.
cvm and cfsnfssg are configured as parallel service groups and are online on all the nodes. The vip1 service group is configured as a failover service group.
See the Symantec Cluster Server Administrator's Guide for more information on service groups and service groups dependencies.