Cloud Computing make traditional IT faster, better and cheaper. It has the potential to change and develop the business and IT landscapes in future.
Cloud is a metaphor for the network and internet. It is used to provide services from computing resources.
Cloud Computing means storing and accessing data and programs over the internet instead of computer hard drive. Earlier IT tradition in which was less efficient, expensive and less reliable for storage requirement, request had been made to the third person, which was long and time consuming. To overcome these problems, servers has been made at the place of that person.
It is a software program or the computer on which program runs that provides a specific kind of service to client software running on the same computer or other. Server has special feature, like faster CPU, plentiful RAM, and larger Hard Drive.
Server is based on the principle of
R A S U M
Reliability Availability Scalability Usability Manageability
Cloud Computing supports RAID Technology. RAID is Redundant Array of Independent Disk. It is a Data Storage Virtualization Technique that combine multiple disk drive components into a logical unit for the purpose of data redundancy and performance improvement. It consists of different levels. Each level perform different function.
In Cloud Computing, different storage types are there. Earlier Direct Attached Storage (DAS) was used. After DAS, Network Attached Storage (NAS) and Storage Area Network (SAN) were developed.
DAS – Direct Attached Storage
NAS – Network Attached Storage
SAN – Storage Area Network
SAN is used for longer distance through IP that why SAN is widely used.
As we know, Cloud Computing performs virtualization, which means technologies designed to provide a layer of abstraction between computer hardware system and the software running on them. By providing a logical view of computing resources rather than a physical view, virtualisation solution make it possible to do useful things.
Cloud provides quick service development and flexible capacity expansions, fast and customize rental services, enhance security, zero touch maintenance and remote multi terminal screen.
Cloud is available in different types that is according to the requirements:-
Public, Private, Hybrid, Mobile, Communication.
Cloud provide services like SaaS, PaaS, IaaS, HaaS, BaaS, MaaS, NaaS. Among all, SaaS, PaaS, IaaS are widely used.
Cloud Computing is different from IT in three basis:-
- It is sold on demand.
- It is elastic.
- Service is fully managed by provider.
NOTE: – Google, Microsoft, Force.com, IBM etc. are the Cloud vendors.