Page 257 - Cloud computing: From paradigm to operation

Framework and requirements for cloud computing 1

Table II.4 – Distributed cloud infrastructure and service provisioning

Use case
Figure

Pre-conditions
(optional)
Post-conditions
(optional)
Requirements – Automatic infrastructure provision (See clause 7.1)
– High speed network connectivity (See clause 7.2)
– Reliable network connectivity (See clause 7.2)
– Network virtualization (See clause 7.2)
– Network services delivery (See clause 7.2)
– Agile service (See clause 7.3)
– Lightweight service (See clause 7.3)
– Automatic service displacement (See clause 7.3)
– Synchronization management (See clause 7.4)
– Adaptive security function control (See clause 7.5)
– Adaptive security suites control (See clause 7.5)

II.5 Hierarchical caching of cloud service images

Table II.5 – Hierarchical caching of cloud service images

Use case

Name Hierarchical caching of cloud service images.
Abstract This use case shows an example of hierarchical caching of cloud service images.
The core cloud mainly manages cloud service images; the size of a cloud service image varies
from tens of megabytes to hundreds of gigabytes. A cloud service image is needed to run a cloud
service. For example, when a cloud service is run on the edge cloud, the image is copied from the
core cloud by request. Thus, depending on the number of requests, the core cloud can be
overloaded. In addition, copying a cloud service image from the core cloud to the edge cloud is
inefficient.
Also, the edge cloud has relatively lower storage capacity than the core cloud or the regional
cloud. It is inefficient for the edge cloud to maintain all cloud service images.

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