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Glossary  


This glossary defines key terms in the context of an OpenVMS Alpha computing environment.

boot, bootstrap  The process of loading system software into a processor's main memory. This guide uses the term boot to refer to this process.

boot server  An Alpha computer that is part of a local area OpenVMS Cluster system. The boot server is a combination of a MOP server and a disk server for the satellite system disk. See also satellite node.

CDSA  Common Data Security Architecture. CDSA is automatically installed with the operating system. For more information about CDSA, see HP Open Source Security for OpenVMS, Volume 1: Common Data Security Architecture.

CI-only Cluster  A computer system consisting of a number of computers. It uses only the computer interconnect (CI) to communicate with other computers in the cluster. These computers share a single file system.

computer interconnect (CI)   A type of I/O subsystem. It links computers to each other and to HSx devices (for example, an HSJ or HSG).

concurrent upgrade  The entire OpenVMS Cluster is shut down and unusable while upgrading each system disk. When the cluster reboots, all cluster members will start up the upgraded version of the OpenVMS operating system. Contrast with rolling upgrade.

device name  The name used to identify a device on the system. A device name indicates the device code, controller designation, and unit number.

disk server  A computer within a local area cluster that provides an access path to CI, DSSI, and locally connected disks for other computers that do not have a direct connection.

HSx device  A self-contained, intelligent, mass storage subsystem (for example, an HSJ or HSG) that lets computers in a cluster environment share disks.

HSx drive  Any disk or tape drive connected to an HSx device (for example, an HSJ or HSG). A system disk on an HSx drive can be shared by several computers in an OpenVMS Cluster environment.

InfoServer  A general-purpose disk storage server that allows you to use the distribution compact disc to install the operating system on remote client systems connected to the same local area network (LAN).

Kerberos  A network authentication protocol that provides authentication for applications using secret-key crytpography. Kerberos is automatically installed with the OpenVMS operating system.

local area OpenVMS Cluster system  A configuration consisting of one or more computers that act as a MOP server and disk server, and a number of low-end computers that act as satellite nodes. The local area network (LAN) connects all of the computers. These computers share a single file system.

local drive  A drive, such as a disk drive, that is connected directly to a computer. If you have a standalone computer, it is likely that all drives connected to the system are local drives.

media  Any packaging agent capable of storing computer software (for example, compact discs, magnetic tapes, floppy disks, disk packs, and tape cartridges).

MOP server  A computer system using either the LAN Auxiliary Control Process (LANACP) or DECnet software to downline load systems using the Maintenance Operations Protocol (MOP). Systems loaded include OpenVMS systems, print servers, and LAT servers.

OpenVMS Cluster system  A computer system consisting of two or more Alpha or VAX computers (or two or more instances in an OpenVMS Galaxy configuration) running HP OpenVMS Cluster software. There are many types of cluster interconnects that can be used to create a cluster environment: for example, CI, DSSI, and LAN devices in a local area network, and Shared Memory CI (SMCI) for OpenVMS Galaxy instances. An OpenVMS Cluster can consist of a single interconnect or a mixed-interconnect cluster with any combination of cluster interconnects.

OpenVMS Galaxy instance  The OpenVMS operating system running on either a soft or a hard partition of a hardware platform.

operating system CD-ROM  The CD-ROM containing the OpenVMS Alpha operating system and the installation and other procedures described in this manual.

platform  A POLYCENTER Software Installation utility concept whereby the OpenVMS Alpha operating system is kitted with options for selected other products (for example, DECwindows Motif and networking products) so that the user can optionally elect to install all at once.

rolling upgrade  Each system disk in an OpenVMS Cluster is upgraded individually, allowing old and new versions of the operating system to run together. Certain members of the cluster are available for use while others are being upgraded. Contrast with concurrent upgrade.

satellite node  A computer that is part of a local area cluster. A satellite node is downline loaded from a MOP server and then boots remotely from the system disk served by a disk server in the local area cluster. See also boot server, disk server, MOP server.

scratch disk  A blank disk or a disk with files you no longer need.

source drive  The drive that holds the distribution kit during an upgrade or installation, or the drive from which you restore files to a target disk.

standalone system  A computer system consisting of a single computer that is not part of a network or OpenVMS Cluster.

system disk  The disk that contains or will contain the OpenVMS operating system. The installation or upgrade procedure transfers the OpenVMS Alpha operating system from the operating system CD-ROM on the source drive to the system disk, also referred to as the target system disk.

target drive  The drive that holds the system disk during an upgrade or installation, or the drive you designate when backing up the system disk.

UETP (User Environment Test Package)   A software package that tests all the standard peripheral devices on your system, various commands and operating system functions, the system's multiuser capability, DECnet software, and the cluster environment.


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