What is cloud computing ?
Cloud computing is integrated collection of resources use virtualization
technology and accessed through the website. The resources are hardware,
software and storage. Cloud computing provide three services to take advantage of these resources. The
services are Software as a Service (SaaS), Platform as a Service (PaaS), Infrastructure
as a Service (IaaS). Software as a Service (SaaS) ) is service from cloud
computing to provide software. Example SaaS : Public email service (Gmail,
Yahoomail, Hotmail, etc.), social networks (Facebook, Twitter, etc.) instant
messaging (YahooMessenger, Skype, GTalk, etc.), Office 365, google docs. Platform
as a Service (PaaS) is service from cloud computing where we rent “home” and
its environment (operating system, network, database engines, application
frameworks, etc.). Example PaaS : Amazon Web Service, Windows Azure, and hosting.
Infrastructure as a Service (IaaS) is service from cloud computing where we can
"rent" IT infrastructure (compute, storage, memory, network, etc.).
Example Infrastructure as a Service (IaaS) Amazon EC2, Windows Azure (soon),
TelkomCloud, BizNetCloud.
Benefit
of Cloud Computing
From
three services of cloud computing , there are some benefit offered to users.
Benefit of Software as a Service (SaaS) we don’t need to buy license and just
connect to internet to use it. Benefit of
Platform as a Service (PaaS) we as developers can focus to make
applications without think about operations of "home" for the
application that we created. Benefit of Infrastructure as a Service (IaaS) we
don’t need to buy physical computer and we can change configuration virtual computer (scale
up / scale down) easily.
Working Principle of Cloud Computing
Users have
easeness to work by cloud computing because working principle of cloud
computing adopt flexibility. This principle use internet to access resource of cloud
computing wherever user is located. Besides flexibility principle cloud
computing is on-demand, users can access data or application in cloud whenever
they want.
Characteristics
of Cloud Computing
- On-demand capabilities: Users have access to user’s services and users have the power to change cloud services through an online control panel or directly with the provider. Users can add or delete users and change storage networks and software as needed.
- Broad network access: Useer can access business management solutions using their smartphones, tablets, laptops, and office computers. They can use these devices wherever they are located with a simple online access point.
- Resource pooling: The cloud enables users to enter and use data within the business management software hosted in the cloud at the same time, from any location, and at any time.
- Rapid elasticity: If anything, the cloud is flexible and scalable to suit users immediate business needs. Users can quickly and easily add or remove software features, and other resources.
- Measured service: Going back to the affordable nature of the cloud, users only pay for what users use. Users and user’s cloud provider can measure storage levels, processing, bandwidth, and the number of user accounts and users are billed appropriately.
Security
of Cloud Computing
Issue
security and privacy in cloud computing still doubtful by users. According to Chief
Technology Officer Vision Solutions, Alan Arnold The data stored on the cloud
platform is actually more secure, because there is a rule that requires every
cloud computing service providers complied with the relevant laws and
regulations. One of the rules to manage the security system for cloud platform
is ISO 27002, this is the standard practice of information security and the
security level that must be owned by the service provider cloud.
Cloud
Computing Concept of Working
The first users
have to make user id in one of service provider cloud computing. For example
cloud storage dropbox. Usually user have to input name, email, and password. After user make id, user can
sign in with their id to access dropbox. Finally users have storage cloud in
dropbox. Users can save data in dropbox
but free account just have 2 Gb storage capacity. Users only pay for upgrade
storage capacity. Users use internet to access website. Website is cloud
computing inteface. From website user can access resource cloud computing.
Referensi
http://cloudindonesia.or.id
http://erpbloggers.com/2013/07/the-five-essential-characteristics-of-cloud-computing/
http://tekno.liputan6.com/read/616537/isu-keamanan-dan-privasi-masih-hantui-pengguna-cloud-computing