Glossary


A

ACL

See access control list (ACL) .

access control list (ACL)

Access control list (ACL) provides greater control over file and folder permissions. ACL enables you to define file or folder permissions for the owner, owner's group, others, and specific users and groups, and default permissions for each of these categories.

active board list

List of components that are in use in a domain. The pcd (1M) keeps the state of this list.

ADR

See Automated dynamic reconfiguration (ADR)

application specific integrated circuit (ASIC)

In the Sun Fire systems, any of the large main chips in the design, including the UltraSPARC processor and data buffer chips.

arbitration stop

A condition that occurs when one of the Sun Fire 15K system ASICs detects a parity error or equivalent fatal system error. Bus arbitration is frozen, so all bus activity stops.

ASIC

See application specific integrated circuit (ASIC)

assigned board list

List of components that have been assigned to a domain by a domain administrator/configurator privileged user. The pcd (1M) keeps the state of this list.

ASR

Automatic System Recovery.

auto-failover

The process by which the SMS daemon, fomd , automatically switches SC control from the main SC to the spare in the event of hardware or software failure on the main.

Automated dynamic reconfiguration (ADR)

The dynamic reconfiguration of system boards accomplished through commands that can be used to automatically assign/unassign , connect/disconnect and configure/unconfigure boards, and obtain board status information. You can run these commands interactively or in shell scripts.

automatic system recovery (ASR)

Automatic system recovery consists of those procedures that restore the system to running all properly configured domains after one or more domains have been rendered inactive due to software or hardware failures or due to unacceptable environmental conditions

available component list

List of available components which can be assigned to a domain by a domain administrator/configurator privileged user. The pcd (1M) keeps the state of this list. setupplatform (1M) updates it.


B

BBC

Bootbus controller. An ASIC used on the CPU & IO boards (also System Controller boards), that connects the Bootbus to the Prom bus and the Console bus

BBSRAM

See bootbus SRAM (BBSRAM) .

blacklist

A text file that hpost (1M) reads when it starts up. The blacklist file specifies the Sun Fire system components that are not to be used or configured into the system. Platform, domain blacklist files can be edited using the enablecomponent and disablecomponent commands. The ASR blacklist is created and edited by esmd .

bootbus

A slow-speed, byte-wide bus controlled by the processor port controller ASICs, used for running diagnostics and boot code. UltraSPARC starts running code from bootbus when it exits reset. In the Sun Fire 15K system, the only component on the bootbus is the BBSRAM .

bootbus SRAM (BBSRAM)

A 256-Kbyte static RAM attached to each processor PC ASIC. Through the PC, it can be accessed for reading and writing from JTAG or the processor. Bootbus SRAM is downloaded at various times with hpost (1M) and OpenBoot PROM startup code, and provides shared data between the downloaded code and the SC.


C

cacheable address slice map (CASM)

A table in the AXQ that directs cacheable addresses to the correct expander.

CASM

See cacheable address slice map (CASM) .

checkpoint data

A copy of the state an SC client is in at a specific execution point that is periodically saved to disk.

CLI

Command line interface.

cluster

A cooperative collection of interconnected computer systems, each running a separate OS image, utilized as a single, unified computing resource.

community

An IP network at a customer site that is physically separate from any other networks.

community name

A string identifier that names a particular community. In the context of External Network Monitoring for Sun Fire 15K system, it is used as the interface group name. See interface group name .

CMR

Coherent Memory Replication.

cmdsync

Command synchronization. Commands that work together to control recovery during SC failover. For example, cancelcmdsync , initcmdsync and savecmdsync .

CPU

Central processing unit.


D

darb

An ASIC on the Sun Fire 15K centerplane that handles data arbitration.

DCU

See domain configuration unit (DCU) .

DHCP

Dynamic Host Configuration Protocol.

DIMM

See dual in-line memory module (DIMM) .

dstop

See domain stop .

disk array

A collection of disks within a hardware peripheral. The disk array provides access to each of its housed disks through one or two Fibre Channel modules.

disk array controller

A controller that resides on the host system and has one or two Fibre Channel modules.

disk array port

A Fibre Channel module that can be connected to a disk array controller that is serviced by a driver pair; for example; soc/pln for SSAs.

domain

A set of one or more system boards that acts as a separate system capable of booting the OS and running independently of any other domains. A machine environment capable of running its own OS. There are up to eighteen domains available on the Sun Fire 15K system. Domains that share a system are characteristically independent of each other.

domain configuration unit (DCU)

Refers to a unit of hardware that can be assigned to a single domain. Domains are configured from DCUs. CPU/Memory, PCI I/O, and hsPCI I/O are DCUs. csb, exb boards and the SC are not.

domain_id

Domain ID of a domain.

domain_tag

Domain name assigned using addtag (1M)

domain stop

An uncorrectable hardware error that immediately terminates the affected domain.

DR

See dynamic reconfiguration (DR) .

DRAM

See dynamic RAM(DRAM) .

drift file

The name of the file used to record the drift (or frequency error) value computed by xntpd . Most commonly ntp.drift .

DSD

Dynamic System Domain. See Domain .

dual in-line memory module (DIMM)

A small printed circuit card containing memory chips and some support logic.

dynamic reconfiguration (DR)

Enables you to logically attach and detach system boards to and from the operating system without causing machine downtime. DR is used in conjunction with hot-swap, which is the process of physically removing or inserting a system board. You can use DR to add a new system board, reinstall a repaired system board, or modify the domain configuration on the Sun Fire system.

dynamic RAM(DRAM)

Hardware memory chips that require periodic rewriting to retain their contents. This process is called "refresh". In the Sun Fire 15K system, DRAM is used only on main memory SIMMs and on the control boards.


E

ECC

Error Correction Code.

Ecache

See external cache (Ecache) .

EEPROM

Electrically Erasable Programmable Read-Only Memory.

Environmental Monitoring

Systems have a large number of sensors that monitor temperature, voltage and current. The SC daemons esmd and dsmd poll devices in a timely manner and makes the environmental data available. The SC shuts down various components to prevent damage.

Ethernet address

A unique number assigned to each Ethernet network adapter. It is a 48-bit number maintained by the IEEE. Hardware vendors obtain blocks of numbers that they can build into their cards. See also, MAC address

external cache (Ecache)

8Mbyte synchronous static RAM second-level cache local to each processor module. Used for both code and data. This is a direct-mapped cache.

external network

A network that requires a physical cable to connect a node to the network. In the context of the Sun Fire 15K system, it is the set of networks connected to the RJ45 jacks located on the front of each Sun Fire 15K system. See external network .

external network interface

One of the RJ45 jacks located on the front of each Sun Fire 15K System Controller.


F

Fibre Channel module

An optical link connection (OLC) module on a disk array controller that can be connected to a disk array port.

Fireplane

Centerplane in the Sun Fire 15K system.

FPROM

Flash programmable read-only memory

FRU

Field replaceable unit.


G

GDCD

See global domain configuration descriptor (GDCD)

global domain configuration descriptor (GDCD)

The description of the single configuration that hpost (1M) chooses. It is part of the structure handed off to OpenBoot PROM.

GUI

Graphical user interface.


H

HA

High availability.

HASRAM

High availability SRAM.

heartbeat interrupt

Interruption of the normal Solaris operating environment indicator, readable from the SC. Absence of heartbeat updates for a running Solaris system usually indicates a Solaris hang.

hpost

Host POST is the POST code that is executed by the SC. Typically this code is sourced from the SC local disk.

HPCI

Hot-pluggable PCI I/O assembly

HPU

Hot-Pluggable Unit. A hardware component that can be isolated from a running system such that it can be cleanly removed from the system or added to the system without damaging any hardware or software.

HsPCI

See HPCI .


I

I1 Network

There are 18 network interfaces (NICs) on each SC that are connected in a point-to-point fashion to NICs located on each of the 18 expander IO slots. All of these point-to-point links are collectively called the I1 network.

I2C

Inter-IC Bus. This is a two-wire bus that is used throughout various systems to run LEDs, set system clock resources, read thermcal information, and so on.

I2 Network

There is an internal network between the two system controllers consisting of two NICs per system controller. This network is called the I2 network. It is not a private network and is entirely separate from the I1 network

IDnet

Inter-Domain Network.

IDPROM

Identification PROM. Contains information specific to the Sun Fire 15K internal machine, such as machine type, manufacturing date, ethernet address, serial number and host ID.

interface group

A group of network interfaces that attach to the same community.

interface group name

A string identifier that names a particular interface group. In the context of External Network Monitoring for Sun Fire 15K system, it is the name associated with a particular community.

ioctl

A control device. This function performs a variety of control functions on devices and STREAMS. For non-STREAMS, the functions performed by this call are device-specific control functions.

IP link

A communication medium over which nodes communicate at the link layer. The link layer is the layer immediately below IPv4/IPv6. Examples include Ethernets (simple or bridged) or ATM networks.

IPv4

Internet Protocol version 4.

IPv6

Internet Protocol version 6. IPv6 increases the address space from 32 to 128 bits. It is backwards compatible with IPv4.

IOSRAM

Input-Output Static Random-Access Memory.

IPMP

IP Network Multipathing. Solaris software which provides load spreading and failover for multiple network interface cards connected to the same IP link, for example, Ethernet.


J

JTAG

A serial scan interface specified by IEEE standard 1149.1. The name comes from Joint Test Action Group, which initially designed it.

JTAG+

An extension of JTAG, developed by Sun Microsystems Inc., which adds a control line to signal that board and ring addresses are being shifted on the serial data line. Often referred to simply as JTAG.


K

kadb

kadb is an interactive kernel debugger with a user interface. For more information refer to the kadb(1M) Solaris man page.


L

LCD

Liquid Crystal Display.

LED

Light Emitting Diode.


M

MAC address

Worldwide unique serial number assigned to a network interface. IEEE controls the distribution of MAC addresses. See also Ethernet address .

mailbox

See Mbox .

MAN

SMS Management Network.

MaxCPU

Dual CPU board.

Mbox

Message passing mechanism between SMS software on the SC and OpenBoot PROM and the Solaris operating environment on the domain.

MIB

Management Information Base.

metadisk

A disk abstraction that provides access to an underlying group of two physical paths to a disk.

metanetwork

A network abstraction that provides access to an underlying group of two physical paths to a network.


N

network interface card (NIC)

Network adapter which is either internal or a separate card that serves as an interface to an IP link.

network time protocol (NTP)

Network Time Protocol. Supports synchronization of Solaris time with the time service provided by a remote host.

NIC

See network interface card (NIC) .

NIS+

Network Information Service Plus. A secure, hierarchical network naming service.

no-domain

Describes the state of a board (DCU) that is not assigned to any domain.

NTP

See network time protocol (NTP) .


O

OBP

See OpenBoot PROM .

OpenBoot PROM

A layer of software that takes control of the configured Sun Fire 15K system from hpost (1M), builds some data structures in memory, and boots the operating system. IEEE 1275-compliant OpenBoot PROM.

OS

Operating system.

OSR

Operating system resource.


P

path group

A set of two alternate paths that provide access to the same device or set of devices.

physical path

The electrical path from the host to a disk or network.

Platform

A single physical computer.

POR

Power-on-reset.

POST

See power-on self-test (POST) .

power-on self-test (POST)

A test performed by hpost (1M). This is the program that takes uninitialized Sun Fire 15K hardware and probes and tests its components, configures what seems worthwhile into a coherent initialized system, and hands it off to OpenBoot PROM. In the Sun Fire 15K POST is implemented in a hierarchical manner with the following components: lpost, spost, and hpost.

PROM

Programmable Read Only Memory.


R

RAM

Random access memory.

RARP

Reverse Address Resolution Protocol.

rstop

Record Stop

Record Stop

A correctable data transmission error.

RPC

Remote procedure call.


S

SBBC

See BBC .

SC

System Controller. The Nordica board that assists in monitoring or controlling the system.

SEEPROM

Serial EEPROM.

SMP

Symmetric multi-processor.

SMS

System Management Services software. The software that runs on the Sun Fire 15K SC and provides control/monitoring functions for the Sun Fire 15K platform.

SNMP

Simple Network Management Protocol.

split-brain condition

When both SCs think they are the main SC.

SRAM

See static RAM (SRAM) .

static RAM (SRAM)

Memory chips that retain their contents as long as power is maintained.

System Board

For next-generation Sun FIre servers, there are five types of system boards, four of which can be found in the Sun Fire 15K system. The system boards are: the CPU/Memory board, the I/O board, the WCI board, the Sun Fire 15K PCI controller board, and the Sun Fire 15K compact PCI controller board.


T

TCP/IP

Transmission Control Protocol/Internet Protocol.

TOD

Time of day.

tunnel switch

The process of moving the SC/Domain communications tunnel from one IO board to another in a domain. Typically occurring when a the IO board with the tunnel is being dynamically reconfigured out.


U

URL

Uniform Resource Locator.

UltraSPARC

The UltraSPARC processor is the processor module used in the Sun Fire 15K system.


V

virtual keyswitch

The SC provides a virtual keyswitch for each domain which controls the bringup process for each domain. The setkeyswitch (1M) command controls the position of the virtual keyswitch for each domain. Possible positions are: on , off , standby , diag and secure .


W

wPCI

Sun Fire Link I/O assembly.


X

XIR

eXternally Initiated Reset. Sends a "soft" reset to the CPU in a domain. It does not reboot the domain. After receiving the reset, the CPU drop to the OpenBoot PROM prompt.