Cloud Computing Questions

Q:

How does cloud computing provides on-demand functionality?

Answer

Cloud computing is a metaphor used for internet. It provides on-demand access to virtualized IT resources that can be shared by others or subscribed by you. It provides an easy way to provide configurable resources by taking it from a shared pool. The pool consists of networks, servers, storage, applications and services.

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Q:

Explain different layers which define cloud architecture

Answer

Cloud computing architecture consists of many layers which help it to be more organized and can be managed from one place. The layers are as follows:


1. Cloud controller or CLC is the top most level in the hirerachy which is used to manage the virtualized resources like servers, network and storage with the user APIs. 


2. Walrus is used for the storage and act as a storage controller to manage the demands of the users. It maintains a scalable approach to control the virtual machine images and user data.


3. Cluster Controller or CC is used to control all the virtual machines for executions the virtual machines are stored on the nodes and manages the virtual networking between Virtual machines and external users.


4. Storage Controller or SC provides a storage area in block form that are dynamically attached by Virtual machines. 


5. Node Controller or NC is at the lowest level and provides the functionality of a hypervisor that controls the VMs activities, which includes execution, management and termination of many instances.

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Q:

What is Hypervisor in Cloud Computing and its types?

Answer

The hypervisor is a virtual machine monitor (VMM) that manages resources for virtual machines. The name hypervisor is suggested as it is a supervisory tool for the virtual machines. There are mainly two types of hypervisors :


- Type-1: the guest Vm runs directly over the host hardware, e.g Xen, Hyper-V, VmWare ESXi


- Type-2: the guest Vm runs over hardware through a host OS, e.g Kvm, Oracle virtualbox

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Q:

What are some open source cloud computing platform databases?

Answer

Cloud computing platform has various databases that are in support. The open source databases that are developed to support it is as follows:


- MongoDB: is an open source database system which is schema free and document oriented database. It is written in C++ and provides tables and high storage space. 


- CouchDB: is an open source database system based on Apache server and used to store the data efficiently


- LucidDB: is the database made in Java/C++ for data warehousing. It provides features and functionalities to maintain data warehouse.

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Q:

How does cloud architecture overcome the difficulties faced by traditional architecture?

Answer

Cloud architecture provide large pool of dynamic resources that can be accessed any time whenever there is a requirement, which is not being given by the traditional architecture. In traditional architecture it is not possible to dynamically associate a machine with the rising demand of infrastructure and the services. Cloud architecture provides scalable properties to meet the high demand of infrastructure and provide on-demand access to the user.

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