Page 267 - Cloud computing: From paradigm to operation

Framework and requirements for cloud computing 1

3.1.7 logical resource [b-ITU-T Y.3011]: An independently manageable partition of a physical resource,
which inherits the same characteristics as the physical resource and whose capability is bound to the
capability of the physical resource.
NOTE – "independently" means mutual exclusiveness among multiple partitions at the same level.
3.1.8 management system [b-ITU-T M.60]: A system with the capability and authority to exercise control
over and/or collect management information from another system.
3.1.9 virtual resource [b-ITU-T Y.3011]: An abstraction of physical or logical resource, which may have
different characteristics from the physical or logical resource and whose capability may not be bound to the
capability of the physical or logical resource.

NOTE – "different characteristics" means simplification or extension of the resource characteristics. "different
characteristics" allows the virtual resource to expose access or control methods different from the original physical or
logical resource.

3.2 Terms defined in this Recommendation
This Recommendation defines the following term:

3.2.1 hypervisor: A type of system software that allows multiple operating systems to share a single
hardware host.

NOTE – Each operating system appears to have the host's processor, memory and other resources, all to itself.

4 Abbreviations and acronyms

This Recommendation uses the following abbreviations and acronyms:
CPU Central Processing Unit
CSC Cloud Service Customer
CSP Cloud Service Provider

DFS Distributed File System
DHT Distributed Hash Table
DNS Domain Name System
ET Emergency Telecommunications

ETS Emergency Telecommunications Service
I/O Input/Output
iSCSI Internet Small Computer System Interface
LAN Local Area Network

NAS Network Attached Storage
NFS Network File System
NTP Network Time Protocol
OS Operating System

QoS Quality of Service
SAN Storage Area Network
SLA Service Level Agreement
vCPU virtual CPU

VI Virtual Infrastructure
VM Virtual Machine
VPN Virtual Private Network

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