Question

Demonstrate knowledge of what a Private Cloud is (Concept of Orchestration, What OpenStack is, and What Elasticity means) & the difference between a private cloud and traditional data center / virtualized environments.

Answer 1

PRIVATE CLOUD: In private cloud model whatever the system and services are present they are accesible only within an organisation. But it can be managed by third party also. access is not allowed to third party only management is done by third party or organisation itself. This model provide high security and privacy.

Concept of open stack in private cloud :

Using open stack we can set our own cloud infrastructure.we can define open stack as a collection of many open source technology which are scalable and provide cloud service. Different services provided by open stack:

1.key stone: (authentication and authrisation service)

2.Glance (it is used for storing images)

3.Nova(it is computing service and here we can lauch our instances and work on them)

4.Neutron service(it is a networking service)

5.Swift (it is used for object storage)

6.Cinder ( it is used for block storage)

Meaning of Elasticity: in cloud there is huge space. Elasticity is one of the property of the cloud which is used to provide a only required amount of space in cloud by any enterprise or organisation. Any organisation can demand cloud space according to their need. The greatest advantage of this property is that company does not have to pay for unused space beacuse it demands only that space which is required.

DIFFERENCE BETWEEN PRIVATE CLOUD AND TRADITIONAL DATA CENTRE

1. Hardware requirement is there in traditional data centre but cloud does not need extra hardware for storing the data.

2.in traditional data centre data is stored on local internal hardware whereas in cloud data is stored in the cloud or external server.

3. we do not need to pay for power, electricity, ac cooling in cloud where as in traditional data centre we have to pay for all these.

4.Fixed cost is applied in traditional data centre whereas in cloud dynamic pricing is available. We pay only for what we use,no extra charge has to be paid .