Star topologies, Snetmon, Star – HP Integrity NonStop J-Series User Manual

Page 316: Split-star, Topologies, Service side, Service connection, Service provider, Star topology, Single-mode fiber-optic (smf) servernet cable

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service connection

A connection between the system console and the OSM software on a NonStop server. A service
connection is initiated from the browser on the system console and can be used to communicate
with the server only when the NonStop operating system is running. The OSM Service Connection
provides a comprehensive service and maintenance picture of the server or ServerNet cluster and
is used to perform most service management tasks.
See also

low-level link (LLL)

.

service processor
(SP) event
messages

A

notification

generated by the

master service processors (MSPs)

on the NonStop server. The

OSM Notification Director

can gather SP event messages directly from the MSPs, allowing SP

event messages to be received when the NonStop operating system is not running.

service provider

A person trained and qualified to service

field-replaceable units (FRUs)

associated with a

NonStop server.

1.

2.

An organization, such as the Global Customer Support Center (GCSC), that helps you
resolve problems with your server or ServerNet cluster. OSM allows you to utilize the help
of a service provider by configuring OSM to support

remote notification

and

remote access

.

service side

The side of a system enclosure that contains the CRUs. It is the side opposite the

appearance

side

. Cables are accessed from the service side.

simplex

A temporary state in which a Blade Complex or processor is running on only one Blade Eelement.
Also called single-modular redundancy (SMR).

single-mode
fiber-optic (SMF)
ServerNet cable

A fiber-optic cable that allows only one mode to propagate. SMF ServerNet cable has a
small-diameter core for optimized long-distance transmission.
See also

multimode fiber-optic (MMF) ServerNet cable

.

slot

A physical labeled space or sheet-metal frame in an

enclosure

into which a

logic board

or other

system component can be installed. Slots have numbers that are unique in the enclosure.

small computer
system interface
(SCSI)

The communication protocol used between a controller pair and the hosts. Specifically, the
protocol is FC-AL or SCSI on Fibre Channel. SCSI is the higher command-level protocol and Fibre
Channel is the low-level transmission protocol.

snapshot

A record of the condition of your NonStop server, including

alarms

and

attribute

values of all

supported resources at the time the file was saved. Snapshots are created and

saved

manually

using the OSM Service Connection.

SNETMON

Abbreviation for the ServerNet cluster monitor process. SETMON is a process pair named $ZZSCL
that manages the state of the ServerNet cluster subsystem. Each node (system) in a ServerNet
cluster must have one SNETMON process pair.

software
configuration
incident report

An

incident report

that notifies you of changes in the software configuration of your NonStop

server. Software configuration incident reports include the server’s software configuration file.
See also

periodic incident report

,

problem incident report

.

source

One of two selection types for filtering OSM status messages. These category types are supported:

OSM encountered an SNMP protocol error.

SNMP

The OSM client or server application encountered an error while performing an OSM
operation.

SP Interface

The OSM operation failed due to a system error.

System

The user specified an incorrect value for the requested operation. Check the specified
value and retry the operation.

User

split-star topology

A network

topology

that uses up to two HP NonStop Cluster Switches for each external fabric.

External routing is implemented between the two starred halves of a ServerNet cluster. (A starred
half consists of up to eight nodes attached to one set of cluster switches.) The starred segments
are joined by four-lane links. The split-star topology supports up to 16 nodes.
See also

star topology

,

tri-star topology

,

layered topology

.

star topology

A network

topology

in which all nodes are connected to a central hub (HP NonStop Cluster

Switch). Each node has its own connection to the network, so a break in the connection does not
affect other nodes in the network. In a ServerNet cluster, a star topology requires one cluster
switch for each external fabric and can support up to eight nodes.

316

Glossary

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