STONEFLY ISC-1208s, Руководство по установке

Страница: 46 / 58

StoneFly ISC Setup Guide Glossary
V8.0.3x © StoneFly Inc. | All rights reserved Page 45
3.
The collection of hardware and software components and operating parameters for
an operating system.
Controller
The control logic in a storage subsystem that performs command transformation and
routing, aggregation (RAID, mirroring, striping, or other aggregation), high-level error
recovery, and performance optimization for multiple storage devices.
Controller-based Array
A disk array whose control software executes in a disk subsystem controller. The member
disks of a controller-based array are necessarily part of the same disk subsystem that
includes the controller.
Database Management System (DBMS)
A set of computer programs with a user and/or programming interface that supports defining
the format of a database, and creating and accessing the data. A database management
system removes the need for a user or program to manage low-level database storage. It also
provides security and assures the integrity of the data it contains. Database management
systems may be relational (table-oriented) or object-oriented.
Data Transfer Rate
The amount of data per unit time moved across an I/O bus while executing an I/O load. For
any I/O load, the data transfer capacity of an I/O subsystem is limited by its data transfer
rate. For disk subsystem I/O, data transfer rate is usually expressed in MB/second (millions
of bytes per second where 1 million is 10
6
).
Detach Image
Detaching an image allows it to be mounted and used by other software applications. The
most common usage is to make a backup copy of the detached image. The detached image
retains the mirror volume information and can be rejoined at any time.
Disk Array
A set of disks from one or more commonly accessible disk subsystems, combined with a
body of control software. The control software presents the storage capacity of the disk to
hosts as one or more logical disks. When it runs on a disk controller, control software is
often called firmware or microcode. Control software that runs on a host computer is usually
called a volume manager.