Veritas Storage Foundation 5.1 SP1 for Oracle RAC Administrator"s Guide (5900-1512, April 2011)

mirroring A form of storage redundancy in which two or more identical copies of data are
maintained on separate volumes. (Each duplicate copy is known as a mirror.) Also
RAID Level 1.
Node The physical host or system on which applications and service groups reside.
When systems are linked by VCS, they become nodes in a cluster.
resources Individual components that work together to provide application services to the
public network. A resource may be a physical component such as a disk group or
network interface card, a software component such as a database server or a Web
server, or a configuration component such as an IP address or mounted file system.
Resource Dependency A dependency between resources is indicated by the keyword "requires" between
two resource names. This indicates the second resource (the child) must be online
before the first resource (the parent) can be brought online. Conversely, the parent
must be offline before the child can be taken offline. Also, faults of the children
are propagated to the parent.
Resource Types Each resource in a cluster is identified by a unique name and classified according
to its type. VCS includes a set of pre-defined resource types for storage, networking,
and application services.
root broker The first authentication broker, which has a self-signed certificate. The root broker
has a single private domain that holds only the names of brokers that shall be
considered valid.
SAN (storage area
network)
A networking paradigm that provides easily reconfigurable connectivity between
any subset of computers, disk storage and interconnecting hardware such as
switches, hubs and bridges.
Service Group A service group is a collection of resources working together to provide application
services to clients. It typically includes multiple resources, hardware- and
software-based, working together to provide a single service.
Service Group
Dependency
A service group dependency provides a mechanism by which two service groups
can be linked by a dependency rule, similar to the way resources are linked.
Shared Storage Storage devices that are connected to and used by two or more systems.
shared volume A volume that belongs to a shared disk group and is open on more than one node
at the same time.
SFCFS (Storage
Foundation Cluster File
System)
SNMP Notification Simple Network Management Protocol (SNMP) developed to manage nodes on an
IP network.
287Glossary