Cloud Computing Infrastructure Cloud Infrastructure Components Cloud infrastructure consists of servers, storag TUTORIALS POINT Simply Easy Learning SERVER Server helps to compute the resource sharing and offer other services such as resource allocation and deallocation, monitoring resources, security, etc. STORAGE Cloud uses distributed file system for storage purpose. If one of the storage resource fails, then it can be extracted from another one which makes cloud computing more reliable. Infrastructural Constraints Fundamental constraints that cloud infrastructure should implement are shown in the following diagram: TRANSPARENCY Since virtualization is the key to share resources in cloud environment. But it is not possible to satisfy the demand with single resource or server. Therefore, there must be transparency in resources, load balancing and application, so that we can scale them on demand. SCALABILITY Scaling up an application delivery solution is not that easy as scaling up an application because it involves configuration overhead or even re-architecting the network. So, application delivery solution is need to be scalable which will require the virtual infrastructure such that resource can be provisioned and de-provisioned easily. INTELLIGENT MONITORING To achieve transparency and scalability, application solution delivery will need to be capable of intelligent monitoring. TUTORIALS POINT Simply Easy Learning SECURITY The mega data center in the cloud should be securely architected. Also the control node, a entry point in mega data center also needs to be secure. TUTORIALS POINT Simply Easy Learning Public Cloud Model Public Cloud ThePublic Cloud allows systems and services to be easily accessible to general public, e.g., Google, Amazon, Microsoft offers cloud services via Internet. CHAPTER 6 TUTORIALS POINT Simply Easy Learning Benefits There are many benefits of deploying cloud as public cloud model. The following diagram shows some of those benefits: COST EFFECTIVE Since public cloud share same resources with large number of consumer, it has low cost. RELIABILITY Since public cloud employs large number of resources from different locations, if any of the resource fail, public cloud can employ another one. FLEXIBILITY It is also very easy to integrate public cloud with private cloud, hence gives consumers a flexible approach. LOCATION INDEPENDENCE Since, public cloud services are delivered through Internet, therefore ensures location independence. UTILITY STYLE COSTING Public cloud is also based on pay-per-use model and resources are accessible whenever consumer needs it. HIGH SCALABILITY Cloud resources are made available on demand from a pool of resources, i.e., they can be scaled up or down according the requirement. TUTORIALS POINT Simply Easy Learning Disadvantages Here are the disadvantages of public cloud model: LOW SECURITY In public cloud model, data is hosted off-site and resources are shared publicly, therefore does not ensure higher level of security. LESS CUSTOMIZABLE It is comparatively less customizable than private cloud.
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