When people think of the cloud, they often think of software as a service (SaaS). However, the service used to supply technology doesn't define the technology. The following five characteristics are how NIST describes cloud computing.
1.Characteristic: On-Demand Self-Service
When an institution develops or deploys a new application, they first must jump through a number of hoops. For example, if an institution decides they would like to install the learning management system Moodle, they might have to order a server, wait for the vendor to ship it, install the server in the data center, provision an IP address for the server, set up the DNS for the new IP address, install the operating system, etc.
While virtualization tools have improved this workflow dramatically, the process can still be cumbersome. With cloud-based services, many of these steps can be eliminated. Interaction with the service provider is minimized, and with a few clicks of a button, an application can be up and running in a matter of minutes.
2.Characteristic: Resource Pooling
With current systems and data centers, IT departments often get stuck in a silo of their own creation. Institutions rarely share computing resources, and if they do, it is cumbersome to create and manage workflows that utilize these shared resources.
With the cloud, multi-tenancy rules. Users of the cloud can provision computing resources based on their needs, and then destroy those resources, giving them back to the shared pool once their needs are met. Additionally, users can share resources amongst themselves. For example, if an institution has developed a new piece of software and would like to share it with other institutions, they can create a template for that system in the cloud and allow other institutions to use that template as they see fit.
3.Characteristic: Rapid Elasticity
Systems change constantly. To create the best experience for users, IT departments often must scale or update systems to meet user demand. Scaling or upgrading a system currently in production can be cumbersome and resource intensive for an IT department.
The cloud provides ways of rapidly scaling to meet user demand. If a system requires more computing resources, an IT department can easily scale the technology to meet those demands. For IT departments that use the cloud, it seems as if they have an endless supply of computing resources available.
4.Characteristic: Broad Network Access
Traditionally, software like Microsoft Word or PowerPoint has been offered as client-based software. Users have to install software to their computers and upgrade systems to handle the programs. If you're away from your computer, you may not have access to the software, which can cause frustration.
Today, much of the software we use is available over the Internet. Many people believe that having a resource available via the Internet is the defining characteristic of the cloud, but it is just one of the five characteristics.
5.Characteristic: Measured Service
To monitor network, server, and application usage, IT departments employ many different monitoring tools and reporting systems. The cloud, however, allows both cloud providers and IT departments to monitor usage. Cloud providers charge IT departments based on their use of computing resources. On the other hand, IT departments can use these metering (or measured) services to scale resources up and down based on information gathered from these particular tools.
2 komentar:
so, have you try to use cloud computing for your business?
how about the scurity?
yes i have, i use that in my social networks not in my business, cause i have no business, lol
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