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Chapter 12 # N nametag A Daemon Monitor nametag that regroups a process tree. A nametag corresponds to a daemon or a group of daemons launched by a startup script. See also Daemon Monitor and startup script. netmask A number that defines how many of the upper bits of an IP address identify a network. In class C addresses, the netmask is 24 bits. The upper 24 bits of a class C address identify the network, and the lower 8 bits identify the node. See network part and host part. network See also cluster network and external network. network part The upper part of an IP address. The network part of an IP address identifies the network on which a node resides. See also host part and netmask. `nhinstall` A tool that facilitates the installation and configuration of the Foundation Services, the Solaris operating environment, and optionally, user applications on a cluster. NIC (network interface card) NMA (Node Management Agent) A service that monitors cluster statistics, initiates a switchover, changes the recovery response for daemon failure, and listens for notifications of some cluster events. The NMA is a JMX compliant management agent based on the Java Dynamic Management Kit. node The basic unit of hardware on which the Foundation Services run. A node is generally a single-board computer equipped with a CPU, memory, and I/O. A node can also contain some secondary storage in the form of flash or compact flash memory. See also master node, peer node, and nonpeer node. node address triplet See address triplet. nodeid (node identification number) The number that identifies a node within a cluster. See also domainid. Node Management Agent See NMA. Node State Manager See NSM. nonpeer node A node that is not configured as a member of a cluster. A nonpeer node can communicate with one or more peer nodes to access resources or services provided by a cluster. See also node and peer node. nonshared packages Packages that are not shared between the master node and the vice-master node. Nonshared packages must be added to both master-eligible nodes. See also shared packages. notification An information message sent by the `nhcmmd` daemon on a local node to services or applications registered to receive it. NSM (Node State Manager) A service that configures a floating external address for an external interface on the master node. After a failover or switchover, the NSM configures a floating external address for an external interface on the new master node. See also floating external address, master node, failover, and switchover.
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