Page 955 - Cloud computing: From paradigm to operation

Monitoring 6

4 Abbreviations and acronyms

This Recommendation uses the following abbreviations and acronyms:
CPU Central Processing Unit

GPU Graphics Processing Unit
IaaS Infrastructure as a Service

I/O Input/Output
IP Internet Protocol
KPI Key Performance Indicator

MDT Mean Down Time
MTBF Mean Time Between Failures

MTTR Mean Time To Repair
NF Network Function
NFS Network Function Status

OSS Operational Support System
PaaS Platform as a Service

QoS Quality of Service
RAM Random Access Memory

SC Service Chain
SDN Software-Defined Networking

SLA Service Level Agreement
TCP Transmission Control Protocol
TBF Time Between Failures

TTR Time To Repair
UPS Uninterruptible Power System

URL Uniform Resource Locator
VIP Virtual Internet Protocol
VM Virtual Machine

5 Conventions

None.

6 Functional reference architecture of cloud computing
The layering framework used in the cloud computing reference architecture has four layers, plus a set of
functions that spans across the layers. The four layers are:
– user layer;
– access layer;
– services layer;

– resources layer.
The functions that span layers are called multilayer functions.

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