Is a technology that allows us to pool the IT resources together and make the data or servicesreadily available on-demand using any device.
1. If mission-critical and non-core, then the application is a good candidate for deployment in the public clouds2. If mission-critical and core, then definitely keep it behind the firewall (you may choose to put them in a private cloud or non-cloud)3. If non-mission-critical and non-core, then deploy in the public clouds4. If on-mission-critical and core, then it's a good idea to keep it behind the firewall (you may choose to put it in a private cloud or non-cloud)
Cloud computing relies on sharing of resources to achieve coherence and economies of scale similar to a utility (like the electricity grid) over a network. At the foundation of cloud computing is the broader concept of converged infrastructure and shared services.The term moving cloud also refers to an organization moving away from a traditional capex model (buy the dedicated hardware and depreciate it over a period of time) to the opex model (use a shared cloud infrastructure and pay as you use it)Proponents claim that cloud computing allows companies to avoid upfront infrastructure costs, and focus on projects that differentiate their businesses instead of infrastructure. Proponents also claim that cloud computing allows enterprises to get their applications up and running faster, with improved manageability and less maintenance, and enables IT to more rapidly adjust resources to meet fluctuating and unpredictable business demand.
References used:“Cloud Computing – Benefits, Risks and Recommendations,” European Network and Information Security Agency (ENISA), 2013“SME Perspectives on Cloud Computing,” ENISA, 2010“An Essential Guide to Possibilities and Risks of Cloud Computing,” Maria Spinola, www. mariaspinola.com, 2009
SoftwareProgramming ToolsHardware InfrastructureKPI DashboardMessagingServersData StorageNetwork AccessUsers List Programming Tools
On demandSelf-Service“Anywhere”network accessRapid Elasticity to Adapt toDemand VolumePay-per-Use
“SME Perspectives on Cloud Computing,” ENISA, 2010Expected Benefits of Cloud Services
Recommended StepsCollaborate as a team– IT, Business, Cloud Service VendorClassify Apps & Services– based on criticality and significanceDecide on Cloud Service– based on criticality and significance
CRITICALNO YESCOREYESNON-CLOUD orPRIVATE CLOUDNON-CLOUD orPRIVATE CLOUDNOSURE forPUBLIC CLOUDCANDIDATE forPUBLIC CLOUD“An Essential Guide to Possibilities and Risks of Cloud Computing,” Maria Spinola, www. mariaspinola.com, 2009CRITICAL – a service which cannot be offline and vital to business survivalCORE – a process integral to the business and cannot be taken outCloud Services Decision Matrix
“SME Perspectives on Cloud Computing,” ENISA, 2010Candidates for Cloud Computing
Tips when going for Cloud ServiceHow do I transition to cloud services?Where is my data going to be?Who will have access to it?How is the data going to be protected?Will the vendor do regular maintenance?What’s customer support going to be like?How can I be ensured of continuous dataavailability?What’s the exit strategy in case I want out?“An Essential Guide to Possibilities and Risks of Cloud Computing,” Maria Spinola, www. mariaspinola.com, 2009