Page 126 - Cloud Essentials

CERTIFICATION SUMMARY

This chapter focused on how cloud adoption can change how IT processes
are managed within an organization. ITIL is a common framework used to
ensure IT processes map to business needs, thus providing business value.
The first ITIL service management phase is Service Strategy, and cloud
adoption introduces new considerations such how cloud elasticity can be

best used to meet variable business workloads. Costs might be managed by
encouraging the use of cloud services at less busy times or by setting a
ceiling dollar amount that cannot be exceeded.
The second ITIL service management phase is Service Design. The cloud
provider SLA can sometimes be negotiated so that it aligns with the needs of
the business. Capacity Management (storage, virtual machines) is important
in meeting the terms in the SLA, as are information security and high

availability of IT services.
Service Operation is the third ITIL phase affected by cloud adoption.
Self-service is a cloud characteristic that allows the self-provisioning of
cloud services, such as the creation of new virtual servers, from a web
portal. Cloud customers are charged a fee based on how many virtual
machines they create and how each virtual machine is configured in terms of

virtual CPUs, memory (RAM), and disk space. When there are disruptions
to cloud services, Incident Management details how to restore IT services
as quickly as possible. Local IT staff within an organization will be
involved with controlling access to cloud services and cloud data for their
users.
The final ITIL phase affected by cloud computing is Service Transition.
Cloud customers might consider when it is appropriate to move applications

and servers from on premises to the cloud or to select new cloud services
that mimic the functionality of in-house systems.

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