BEING IN THE CLOUD
1.WHAT IS CLOUD COMPUTING ?
It is more than anything on the internet and also more than virtualization technologies. The concise definition put forth by the National Institute of Standards and Technology (NIST) is
cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to shared pool of configurable computing resources (e.g. networks, servers, storage, application and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction.
2. WHAT ARE THE CHARACTERISTICS OF CLOUD COMPUTING?
NIST's five essential characteristics of cloud computing provides enough specifics to break the myth that "the internet equals the cloud". Neither simple web hosting nor virtualized data centers deliver the following comprehensive cloud benefits:
1. On-demand self-service
2. Broad network access
3. Resource pooling
4. Rapid elasticity
5. Measured Service
3. WHAT ARE THE SERVICE MODELS AVAILABLE?
1. Infrastructure as a Service (Iaas)
2. Platform as a Service (PaaS)
3. Software as a Service (Saas)
The other two service model apart from the standard service models are:
4. Data as a Service (Daas)
5. Business Process as Service (BPaaS).
Cloud computing environment fall into one of four different models mentioned below:
a. Public Cloud
b. Private Cloud
c. Community cloud
d. Hybrid cloud
5. WHAT ARE THE RISKS INVOLVED IN CLOUD COMPUTING?
Many foresee 'Security of data' as a major risk involved in cloud computing.
Multitenancy may bring performance issue.
6. WHAT ARE THE ADVANTAGES OF CLOUD COMPUTING BEYOND COST SAVINGS?
1. Reduced resource needs
2 .Reduced time to market
3. Reduced capital expenditure
4. Increased availability
5. Cost transparency
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