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Blade Glossary

BladeUser.org Glossary of Terms

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d
DASD - Direct Access Storage Device
A device that allows storage to be directly accessed, such as a disk drive.
DC - Domain Controller
For a Windows NT Server or Windows 2000 Server domain, the server that authenticates domain logons and maintains the security policy and the security accounts master database for a domain. Domain controllers manage user access to a network, which includes logging on, authentication, and access to the directory and shared resources.
DDM
Deployment and management
DDR
Double data rate
DDR2
Double data rate 2
Deployment Policy
A policy that associates a specific bay in a BladeCenter chassis with a Remote Deployment Manager (RDM) noninteractive task. When a blade server is added to or replaced in the bay, IBM Director automatically runs the RDM task.
Desktop Management Interface
A protocol-independent set of application programming interfaces (APIs) that were defined by the Distributed Management Task Force (DMTF). These interfaces give management application programs standardized access to information about hardware and software in a system.
DHCP - Dynamic Host Configuration Protocol
A communications protocol that is used to centrally manage configuration information. For example, DHCP automatically assigns IP addresses to computers in a network.
DIMM - Dual Inline Memory Module
A small circuit board with memory-integrated circuits containing signal and power pins on both sides of the board.
DIN
Discrete input
Directory
An organization of files (or folders) grouped for the user's convenience.
Directory Manager
A facility for maintaining the user directory of one or more z/VM systems.
Discovery
The process of finding resources within an enterprise, including finding the new location of monitored resources that were moved.
Disk Pool
In z/VM Center, a logical grouping of contiguous disk spaces. A disk pool can include disk spaces from multiple physical disks. A disk pool corresponds to a z/VM Directory Maintenance Facility allocation group.
Diskette
A thin, flexible magnetic plate that is permanently sealed in a protective cover. It can be used to store information copies from the disk or another diskette.
DLPAR - Dynamic Logical Partitioning
The ability to move processors, memory, and interactive performance between logical partitions without restarting a logical partition or the server.
DMI - Desktop Management Interface
A protocol-independent set of application programming interfaces (APIs) that were defined by the Distributed Management Task Force (DMTF). These interfaces give management application programs standardized access to information about hardware and software in a system.
DNS - Domain Name System
The distributed database system used to map domain names to IP addresses.
DoS - Denial-of-Service Attack
In computer security, an assault on a network that brings down one or more hosts on a network such that the host is unable to perform its functions properly. Network service is interrupted for some period.
DOS - Disk Operating System
An operating system for computer systems that use disks and diskettes for auxiliary storage of programs and data.
DSCP
differentiated services code point
DTP
Dynamic trunking protocol

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