Cloud computing

HASHIB AL HASANID:12331009Dept.of Computer Science & Engineering

Content of the Cloud Computing

What Is Cloud Computing? Applications Types of Cloud Computing Models Advantages of Cloud Computing Disadvantages of Cloud Computing Cloud Storage

What is cloud computing?

Cloud computing refers to manipulating, configuring and accessing the applications online. It offers online data storage, infrastructure and applications.

Cloud computing is both a combination of software and hardware based computing resource delivered as a network service.

Applications

Social networking site E-mail sites Search engines Many more services over the

network.

Basic concepts

There are certain services and models working behind the scene making the cloud computing feasible and accessible to end user. Following the working model of cloud computing:

1. Deployment model2. Service model

Deployment Models

Public cloud Private cloud Community cloud Hybrid cloud

Public cloudThe public cloud allows systems and services to be

easily accessible to the general public. Public cloud may be less secure because of its

openness.

Private cloudThe private cloud allows systems and services to be

accessible within an organization.It offers increased security because of its private

nature.

Community cloudThe community cloud allows systems and services to be

accessible by group of organization.

Hybrid cloud The hybrid cloud is mixture of public and private cloud.

However, the critical activities are performed using private cloud while the non-critical activities are performed using public cloud.

Service models

IaaS (Infrastructure as a Service): Just network is provided.

PaaS (Platform as a Service): Operating system and network is provided.

SaaS ( Software as a Service): Required software, operating system and network is provided.

Advantages

Lower computer costsImproved performanceReduced software costsInstant software updatesImproved document

format compatibility

Advantages

Unlimited storage capacityIncreased data reliabilityUniversal document accessLatest version availabilityEasier group collaborationDevice independence

Disadvantage

Requires a constant Internet connection

Does not work well with low-speed connections

Features might be limited

Disadvantage

Can be slowStored data might not be

secureStored data can be lostCompatibility for

clouds/DB/etc.

Cloud Storage