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Glossary Terms

a
ACL

Access Control List - ACL's are used to specify who has access to what resources. Typically they are applied at either the network or file system level. Example: A network ACL may specify that users on the 10.1.1.0/24 subnet has access to NFS Shares on server1 whereas a file system ACL may specify that user1 can read and execute the files in folder1, but cannot delete the files.

Active Directory

A Database integrated into Microsoft Windows Domain controllers used for tracking and authenticating User and Computer accounts on a Network.

Active Directory also tracks Configuration and Identity Information for Users, Computers and Applications within a given Domain.

c
CIFS

Common Internet File System Also Known as Windows Share or SMB

Cluster Aware File System

A File system designed to work with more than one computer system connected simultaneously.

CMS

Console Monitor System

CP

Control Program

CP

Copy Command on a Unix/Linux Computer System

f
FCOE

Fiber Channel Over Ethernet. A method of sending Fiber Channel commands over an Ethernet Network. with FCOE the Fiber Channel calls are wrapped in TCP Packets.

Fiber Channel

A protocol used for a server to communicate with it's storage devices over a Fiber Optic connection

File Share

A collection of files shared between one computer and another

h
HBA

Host Bus Adapter. Used for connecting computer to SAN based Storage

Host Machine

The computer that runs a Virtual Machine Guest Machine/Operating System - a Virtualized Computer running on a Host Machine. Ballooning - The process where a Host Machine proactively fills the memory of a guest machine to force the guest machine to give up memory it no longer needs.

Hyper-V

Software Created by Microsoft to server as a host for Virtual Machines

i
IOPS

Input Output per Second (A measurement of hard disk performance)

iSCSI

iSCSI also known as Internet SCSI is a method of connecting your server to your storage device. iSCSI encapsulates SCSI commands into TCP packets, then transmits them over the network to your storage devic

iSCSI Initiator

Software allowing a Client Machine to connect to an iSCSI Resource on the network

iSCSI Target

Software running on a Server allowing the server to share a resource via the iSCSI protocol

ISO File

An ISO file is an image of a CD or DVD.

j
JIT

Just In Time - Refers to a method of creating programs where they do not compile until right before they are executed.

l
LDAP

Lightweight Directory Access Protocol

Linux

A Family of Operating Systems based on UNIX

LUN

Logical Unit Number when a storage is shared using Fiber Channel, iSCSI or a similar protocol it is typically referred to as a LUN. Each resource gets a unique LUN so the client machine can differentiate between the different resources.

m
MSCS

Microsoft Clustering Services

n
NAS

Network Attached Storage

Netapp

Network Appliance. A Company that makes storage Appliances such a Storage Area Networks and Network Attached Storage.

NFS

Network File System. A Method of sharing files between computers on a network. Typically used in Unix/Linux environments.

NTFS

NT File System

o
OCFS2

Oracle Cluster File system

p
Packet

A unit of formatted information sent over a Computer Network

Perfstat

A utility to show Performance statistics

s
SAN

Storage Area Network

SAS

Serial Attached SCSI

SATA

Serial Advanced Technology Attachment - Interface for connecting storage devices to a computer

SMB

Server Message Block sometimes called Samba Also Known as Windows Share or CIFS

Solaris

A Unix Operating system made by SUN Microsystems and now owned by Oracle.

SSH

Abbreviation for Secure Shell - Tool Similar to Telnet and remote shell commands allowing for secure communications and file transfers between computers.

t
TCP

Transmission Control Protocol

u
UNC

Universal Naming Convention, a Method of specifying the location of a network resource in a Windows Environment.

v
Virtual Machine

An instance of a Computer Operating system running within a container on Simulated Hardware.

VMFS

VMWare File System

VMWare

A Company specializing in Server and Application Virtualization software.

w
Windows

A Computer Operating System made by Microsoft Corporation.

x
Xenserver

Software Created by Xensource and later acquired by Citrix Systems for hosting Virtual Machines